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: the mass of a planet causes the pull of gravity on that planet, Fact2: Earth is a living planet., Question: What causes the pull of gravity? (A) layers of fat (B) Earth's mass (C) Time and energy (D) flow of electrons (E) kinetic energy (F) friction (G) an object (H) heat energy
Student:
B