Daniel: Historically, railroads substantially altered the course of the United States economy, enabling the country to enjoy unprecedented growth in the nineteenth century.
Robert: It's true that growth required cheap inland transportation, which railroads provided. But with government support similar to the massive land grants that subsidized rapid railroad expansion, canals and roads could have had the same effect.
Which of the following is most likely a point that Robert believes is at issue between Daniel and himself?

• A. Whether the government should have supported canals and roads in the U.S. in the nineteenth century
• B. Whether railroads were necessary for the unprecedented economic growth in the U.S in the nineteenth century
• C. Whether railroads' contribution to economic growth was enabled by government support
• D. Whether economic growth depends on government support for technology that encourages that growth
• E. Whether the nineteenth-century economic growth in the U.S. was caused by railroads

The Hupa's overwhelming interest in wealth and social position allies them with the North Pacific tribes, but the Hupa thought that the distribution or destruction of property during a potlatch, as those tributes did, was a preposterous idea and beyond their comprehension.

• A. the Hupa thought it a preposterous idea and beyond their comprehension to distribute or destroy property during a potlatch, like those tribes did
• B. the distribution or destruction of property during a potlatch by the latter was a preposterous idea to them and beyond their comprehension
• C. the latter's distribution or destruction of property during a potlatch was to the Hupa a preposterous idea and beyond their comprehension
• D. the Hupa thought that the distribution or destruction of property during a potlatch, as those tribes did, was a preposterous idea and beyond their comprehension
• E. their distribution or destruction of property during a potlatch they thought was a preposterous idea and beyond their comprehension

The belief of physicists Enrico Fermi and Glenn Seaborg, articulated In 1946, that nuclear physics would ultimately prove more useful a tool in medical diagnosis treatment than as a source of energy was not widely shared by their colleagues.

• A. a more useful tool in medical diagnosis and treatment than as
• B. more useful a tool in medical diagnosis and treatment than as
• C. more useful as a tool in medical diagnosis and treatment than
• D. a more useful tool in medical diagnosis and treatment than
• E. more useful as a tool for medical diagnosis and treatment than as

In good times, an auction is the obvious choice for colectors wanting to sell a work of art, but A did just a few short months ago.

• A. to do so, fewer of them put up their holdings for auction as they
• B. to put their holdings up for auction, they don't, and fewer are doing so now than
• C. to, fewer collectors are putting their holdings up for auction as
• D. to, collectors aren't putting their holdings up for auction, and there are fewer than
• E. to, less of them are putting their holdings up for auction than

What is the area of triangle ADC shown in the figure?
(1) The ratio of the length of line segment AD to the length of line segment DB is 1 to 3.
(2) The area of triangle ABC is 8.

• A. EACH statement ALONE is sufficient
• B. Statements (1) and (2) TOGETHER are NOT sufficient.
• C. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
• D. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE Is sufficient.
• E. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.