Teacher: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").
Teacher: Now, understand the problem? Solve this instance: Fact1: Many plants respond to the days growing shorter in the fall by going dormant., Fact2: Cottonwoods are dormant during the fall., Question: What happens to cottonwoods when the days get shorter? (A) They bloom (B) They go dormant (C) Dehydration (D) It helps them survive (E) Exfoliation (F) They die (G) They reproduce (H) They may not survive.
Student:
B