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: Veins generally carry deoxygenated blood., Fact2: Deoxygenated blood is heavy with carbon dioxide., Question: What does blood in the veins have a lot of? (A) Carbon dioxide (B) Carbon monoxide (C) h2o (D) Energy. (E) Air (F) kinetic energy (G) Decibels (H) Chemical energy
A