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").

The shape of a hummingbird's beak is an adaptation for (A) getting to hard to reach wood (B) getting to hard to reach females (C) getting to hard to reach rocks (D) getting to hard to reach nutrients
D

the presence of which of these is required for the formation of cavernous chambers? (A) some carbonated soda (B) some carbon dioxide (C) some carbonic acid (D) carbon monoxide gas
C

An area where snow falls more of the year is often (A) rainy (B) windy (C) higher (D) forested
C