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: Ancestors of hagfish are thought to have been the earliest vertebrates., Fact2: Bone is found only in vertebrates ., Question: Ancestors of hagfish are thought to have had the earliest what? (A) Growth (B) pigment (C) 86400 (D) Haggard skin (E) marine (F) Bones (G) Early Morning (H) Fish Smell
Student:
F