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").
Example: Fact1: a plant requires sunlight to grow, Fact2: Plants to avoid are fast-growing vines that can take over an area in no time., Question: What requires sunlight in order to take over an area? (A) spores (B) fish (C) plants (D) humans (E) pods (F) Oak (G) opossums (H) coral
Example solution: C
Example explanation: This is a good example. Based on the facts plants require sunlight in order to take over an area.

Problem: Fact1: Cells are the microscopic building blocks of organisms., Fact2: Plants and animals are organisms., Question: What are cells in plants and animals? (A) production of energy (B) absorb light energy (C) large building blocks (D) sub-units of species (E) cellulitis (F) microscopic bulding blocks (G) disease (H) microorganisms

Solution: F