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: an aquatic animal requires great amounts of water to survive, Fact2: Beavers are primarily aquatic animals., Question: what requires great amounts of water to survive (A) sunlight (B) beavers (C) octopus (D) mussels (E) trout (F) carbon (G) oxygen (H) amphibians
B

Fact1: if soil is permeable then water easily flows through that soil, Fact2: If a soil has high permeability, water flows through the soil more freely and may cause chemicals to leach., Question: What may cause chemicals to leach in soil? (A) soil is permeable (B) Pesticides (C) soil is hard (D) soil is dense (E) soil is eroded (F) Organic compounds (G) fossil fuels (H) harmful substances
A

Fact1: Differentiation is the process by which unspecialized cells become specialized., Fact2: Nerve cells are large, complicated, highly specialized cells., Question: What is essential for development of nerve cells? (A) vibration (B) steel (C) Extensive bone growth (D) One can hear (E) stress (F) melanin content (G) sound vibrations (H) differentiation
H