You will be given a definition of a task first, then some input of the task.
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").

a Punnett square is used to identify the percent chance of a trait being passed down from a parent to its what? (A) home (B) younglings (C) animals (D) pets
Output:
B