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").

Some people have an (A) tubs for skin (B) extra rib (C) snakes for hair (D) magic
B

A bird is about to lay an egg, so it needs to construct a safe, round place to place the egg in. The bird constructs using (A) sticks (B) gum (C) rocks (D) tape
A

Which of these helps some animals find mates by color? (A) hearing (B) smell (C) eyesight (D) nose

C