instruction:
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").
question:
What uses eyes to see by sensing light? (A) trees (B) algae (C) worms (D) elephants
answer:
D


question:
People can touch something to see if it's (A) shiny (B) red (C) striped (D) wrinkled
answer:
D


question:
A laser produces a light source, which may be useful in (A) cleaning a glass (B) juggling stones (C) playing with felines (D) doing the dishes
answer:

C