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: if weather is stormy then there is a greater chance of rain, Fact2: Rain is our usual form of precipitation., Question: If the weather is stormy, there is a greater chance for what? (A) nightfall (B) precipitation (C) sunshine (D) negative feedback (E) daylight (F) air pollution (G) trucks and cars (H) miles per hour
[EX A]: B

[EX Q]: Fact1: Veins generally carry deoxygenated blood., Fact2: Arteries and veins are blood vessels., Question: what generally carries deoxygenated blood? (A) blood vessels (B) animals (C) layers of fat (D) mammals (E) critical organs (F) an organism's body (G) elephants (H) athletes
[EX A]: A

[EX Q]: Fact1: Phylogeny is the evolutionary history of a group of related organisms., Fact2: Metazoan phylogeny Phylogeny of phyla is poorly understood., Question: What is poorly understood for metazoas? (A) habitat (B) antigens that cause allergy (C) intervertebrate (D) evolutionary history (E) protein foreign to the body. (F) nucleotides composing polymers (G) melanin content (H) vertebrate
[EX A]:
D