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: sandpaper is used to smooth wooden objects, Fact2: For the casual look, try using a wooden picnic table., Question: What can be used to smooth tables? (A) backbones (B) keratin (C) sandpaper (D) sand dollar (E) lamphreys (F) wax paper (G) sponges (H) aluminum foil
A:
C