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: the emission of sulfur dioxide causes acid rain, Fact2: The sulfur dioxide is converted into sulfuric acid., Question: what causes acid rain? (A) gases (B) rainfall (C) Pollution (D) fossil fuels (E) emissions (F) vehicles (G) burning (H) wind
[EX A]: E

[EX Q]: Fact1: Gymnosperms are vascular plants that produce seeds in cones., Fact2: Gymnosperms are the plants that are known as evergreens., Question: What are vascular plants that produce seeds in cones? (A) evergreens (B) it needs them (C) Leptospirosis (D) epidermal (E) Conifers (F) white (G) Newton (H) more abundant
[EX A]: A

[EX Q]: Fact1: a gasoline lawn mower converts gasoline into motion, Fact2: Gasoline lawn mowers can be as bad as cars when it comes to emissions., Question: Gasoline mowers convert gasoline into something as bad as what when it comes to emissions? (A) Roads (B) oil (C) buses (D) shoes (E) homes (F) trees (G) cars (H) bears
[EX A]:
G