In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

Which makes a sound when you interact with it? (A) something invented by Pasteur (B) something invented by van Leeuwenhoek (C) something invented by Sax (D) something invented by Galileo
C

A plane travels through what? (A) gas layers (B) plains (C) oceans (D) time
A

Which event can lead to the human caused change of an environment? (A) seasonal storms (B) annual flooding (C) natural woodland fires (D) clear cutting

D