Answer from Veritas:
Question 1D. Paragraph two cites historians as saying the only way that American industry was able to support its war production efforts was that it passe the Lend-Lease act. Therefore, without the Act, industry would have been unable to support it.
Choices A and B are popular incorrect answers. While the Act is a turning point away from German control, it cannot be determined that German control would have lasted as long as choice A says it did. And Choice B also goes too far - "no financial interest" is a strong statement; the passage says that the act tied American financial interests directly to British fortunes in the war, but it doesn't say that there weren't other, perhaps less direct financial ties.
Question 2D. The author's tone in this passage is explanatory, and he begins with the passage of the Act and ends with the final stage of its history, so it can certainly be inferred that his purpose is to provide an overview of it's history. Choices A and E can be eliminated in large part because of tone, as the author doesn't take a hard stand on the Act at all. And choice C, a popular trap, is also incorrect, as the pros and cons of the Act are only mentioned in paragraph two - the legacy covered in paragraph three goes to show that the author is doing more than just discussing the arguments on either side.
Question 3C. The second paragraph notes that historians believe the Lend Lease Act was "the only way that the American wartime industry would have been prepared to supply its own military...", essentially stating that the Lend-Lease Act led to military production. Choice A is incorrect as nowhere in the passage is Britain credited with the WWII win. Choice B is incorrect as the passage does not directly provide information that the act was controversial. The act had opponents, but we cannot infer that there was any true controversy around the act. Choice D is incorrect, as historians only state that production in late 1941 would have been impossible without the act; the choice goes too far in saying that the entire war would have been impossible to win. And choice E also goes too far; all we know is that the final payment was made in 2006, not that it was because Britain couldn't afford to pay it.