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: cold fronts cause thunderstorms as they pass by, Fact2: If cold air replaces warm air, it is called a cold front., Question: What does cold air replacing warm air cause? (A) Greenhouse gases (B) Pollution (C) Dehydration (D) thunderstorms (E) steady barometer readings (F) hypothyroidism (G) constant air pressure (H) stagnant air temperature
[EX A]: D

[EX Q]: Fact1: Oncogenes promote the division of cells with damaged DNA., Fact2: Oncogenes are genes that promote division., Question: genes that promote division do so with what? (A) Most plants (B) damaged DNA (C) peachleaf willow (D) Plants growth (E) Animal survival (F) Chemical energy (G) Change colors (H) Microscope
[EX A]: B

[EX Q]: Fact1: Earthworm burrows help aerate soil, which is also good for plants., Fact2: Aeration breaks up the soil and allows water to penetrate., Question: _ allow water to penetrate the soil. (A) crawfish burrows (B) major threat to health (C) Deposition (D) bending light rays (E) earthworm homes (F) Exfoliation (G) termite burrows (H) Earthworm burrows
[EX A]:
H