单项选择题
We may infer from the context that "proponents" (ParA．3) most probably means （）
A. arguments in support of something B. disagreements C. people who argue for something D. people who argue against something
单项选择题 Which of the following statements best expresses the main idea of the passage（）
单项选择题 21（）
单项选择题 56（）
