You will be given a definition of a task first, then some input of the task.
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").

Fact1: the mass of an object causes the gravitational force exerted by that object, Fact2: Gravitation is a constant impelling force., Question: The mass of an object causes _. (A) heat is produced (B) kinetic energy (C) It gets heated up (D) a constant impelling force (E) a tree falling (F) a lot of human deaths (G) principals of aerodynamics (H) body temperature reduces
Output:
D