Wechose500collegestudentsandusedtheInternettoteachthem100wordsthatoftenappearinacademictexts.

['A.\nThis sentence gives us the main idea of the “method and procedures” section of the research article.', 'B.\nThis sentence gives us the main idea of the “introduction” section of the research article.', 'C.\nThis sentence gives us the main idea of the “conclusion” section of the research article.', 'D.\nThis sentence gives us the main idea of the “discussion” section of the research article.']