Detailed 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").
Problem:Fact1: when water freezes , that water expands, Fact2: Water density is determined by temperature., Question: What property of a substance changes when it is frozen? (A) motility (B) molecular make-up (C) molecules (D) elements contained (E) Weight (F) energy (G) size (H) density
Solution:
H