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").
Q: Fact1: Biodiversity generally increases from the poles to the equator., Fact2: Biodiversity is equated with the number of different organisms present in a habitat ., Question: What increases in habitats from the poles to the equator? (A) The number of individuals (B) sub-units of species (C) the Arctic (D) different organisms' numbers (E) ice (F) biological diversity (G) penguins (H) heat and light
A:
D