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").

[EX Q]: Fact1: Cells are organized into tissues, and tissues form organs., Fact2: Major organs, including the kidneys and liver, begin to grow., Question: what forms the liver? (A) bile (B) alcohol (C) stones (D) animals (E) ovaries (F) cells (G) meat (H) humans
[EX A]: F

[EX Q]: Fact1: sandpaper is used to smooth wooden objects, Fact2: All objects, even wooden tables, are made up of molecules which vibrate to create their mass., Question: What can be used to smooth a table? (A) Wax paper (B) Sponge (C) lamphreys (D) Tissue (E) Sandpaper (F) scratching it (G) keratin (H) tiny hairs
[EX A]: E

[EX Q]: Fact1: a warm front causes cloudy and rainy weather, Fact2: Winds are calm and skies are clear or partly cloudy when the eye of a storm passes., Question: What does a warm front cause? (A) friction (B) symptoms (C) rainfall (D) fire (E) tsunamis (F) heat (G) earthquakes (H) storms
[EX A]:
H