Q: 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").
which of these eventually form crude oil after millions of years in the earth? (A) a plastic set of cups (B) a family of dogs (C) a twelve pack of beer cans (D) a set of silverware
A:
B