TOEFL Listening: TPO-TOEFL听力TPO - 240JMCKY2Z8R8HTVR$

Why does the professor talk about dropping a matchstick? A. To imply that Earth's equator is not the best place to test the law of gravity. B. To indicate that the atmosphere affects how fast objects fall. C. To illustrate how natural it is to have antiheliocentric beliefs. D. To identify the inspiration for antiheliocentrism.