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").

[Q]: Fact1: threatening behavior by predators causes a porcupine to extend its quills, Fact2: Puffers are smooth skinned while Porcupines have the characteristic spines or quills., Question: What does a porcupine do with its spines when it's threatened? (A) killing insects (B) Shoot them (C) kill them (D) protect them (E) Extend them (F) Shed them (G) Retract them (H) behave
[A]: E


[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
[A]: E


[Q]: Fact1: a flower 's purpose is to produce seeds, Fact2: Reproduction is by seeds and spreading rhizomes., Question: A flower 's purpose (A) protection (B) photosynthesis (C) it needs them (D) reproduction (E) circulatory system (F) Plant reproduction (G) camaflouge (H) genetic diversity
[A]:
D