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: Bile reduces the acidity of food entering from the highly acidic stomach., Fact2: Bile , synthesized by the liver, contains HCO3-, bile salts and bile pigments., Question: What organ plays a role in reducing the acidity of food (A) enzymes (B) osculum (C) liver (D) saliva (E) a hosta (F) insulin (G) cells (H) Protein
A:
C