Instructions: In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").
Input: Fact1: the number of rings in a tree trunk can be used to estimate the age of the tree, Fact2: Age of Pine trees (AGE) in years., Question: what unit of time can be estimated by the rings in a tree trunk? (A) hours (B) decades (C) months (D) H20 (E) Joules (F) DNA (G) years (H) seasons
Output:
G