It can be inferred from the passage that the author believes which of the following to be true of the amphibian extinctions that have recently been reported?

It can be inferred from the passage that the author believes which of the following to be true of the environmentalists mentioned in the highlighted text?

The primary purpose of the passage is to

According to the passage, which of the following describes a result of the way in which researchers generally conduct clinical trials?

The author mentions patients' ages (in the highlighted text) primarily in order to

It can be inferred from the passage that a study limited to patients like those mentioned in the highlighted text would have which of the following advantages over the kind of study proposed by Frazier and Mosteller?

Which of the following can be inferred from the passage about a study of the category of patients referred to in the highlighted text?

The passage is primarily concerned with

Which of the following, if true, would most clearly undermine Gallagher's explanation of the link between Royalism and feminism?

The primary purpose of the passage is to