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").

[EX Q]: pushing against a rolling boulder will decrease its (A) size (B) height (C) impetus (D) ambitions
[EX A]: C

[EX Q]: A plastic toy reduced to a puddle was left on a (A) steep mountain (B) iceberg (C) government propaganda flick (D) hotplate
[EX A]: D

[EX Q]: Limestone is formed by water evaporating from a solution of water and mineral and a hard sedimentary rock used as building material and for making (A) lipstick (B) cement (C) lemon-lime soda (D) mineral water
[EX A]:
B