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: rocks interacting with wind over long periods of time causes weathering, Fact2: On Earth, rocks are weathered by wind and water, creating soil and sand., Question: What causes rocks to weather? (A) seasons (B) force (C) erosion (D) storms (E) water (F) heat (G) lightning (H) gas
[A]: E

[Q]: Fact1: Protozoa can be classified on the basis of how they move., Fact2: Paramecium are protozoa, single celled animals., Question: What can be classified on the basis of how they move? (A) each species (B) aquatic organisms (C) reptiles ancestral to mammals (D) single celled organisms (E) microbes and mussels (F) trailers and boats (G) How fast a vehicle is going (H) melanin content
[A]: D

[Q]: Fact1: a refrigerator is used for keeping food fresh for a long period of time, Fact2: People consume foods that are cold from refrigeration., Question: What used for keeping food fresh for a long period of time? (A) cooled (B) viruses (C) Energy (D) heat (E) Winter (F) bacteria (G) cold (H) phytoplankton
[A]:
G