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").

When observing animals in the wild, which of these are you most likely to see? (A) A frog stalking a rabbit (B) A bear sticking its claws in the river (C) A wolf hunting an eagle (D) A tiger hunting a dolphin
B

Pulse accelerates (A) when cooling down after a work out (B) when running pace increases (C) when running pace slows (D) when entering into a sleep state
B

glass crystals will cause light to (A) go out (B) dim (C) deflect (D) brighten

C