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: plant requires seed dispersal for reproduction, Fact2: Reproductive investment was measured as seed mass, samara size, and dispersal ability., Question: What requires investment, seed mass, size and dispersal? (A) plants (B) Species (C) animals (D) coral (E) Oak (F) gene flow (G) Frogs (H) mussels
[EX A]: A

[EX Q]: Fact1: rocks interacting with wind over long periods of time causes weathering, Fact2: On Earth, rocks are weathered by wind and water, creating soil and sand., Question: What causes rocks to weather? (A) seasons (B) force (C) erosion (D) storms (E) water (F) heat (G) lightning (H) gas
[EX A]: E

[EX Q]: Fact1: when a river floods , that river deposits soil in flood plains, Fact2: When the river is full, it floods into the flood plain and leaves behind fertile soil., Question: Where do plains get soil from? (A) earth (B) hurricanes (C) Sediment (D) ocean (E) canyons (F) wind (G) climate (H) floods
[EX A]:
H