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: Wings are part of the exoskeleton and attached to the thorax., Fact2: Insects have exoskeletons., Question: What is attached to insects' thorax? (A) sugar (B) Energy. (C) antennae (D) Energy (E) wings (F) nothing (G) food (H) pancreas
[EX A]: E

[EX Q]: Fact1: cold fronts cause thunderstorms as they pass by, Fact2: Thunderstorms create havoc., Question: What do cold fronts cause? (A) death (B) complex (C) wind (D) streams (E) deadly (F) disease (G) havoc (H) mildew
[EX A]: G

[EX Q]: Fact1: Muscle contraction occurs when muscle fibers get shorter., Fact2: Muscles can only contract and relax., Question: What occurs when muscle fibers get longer? (A) photosynthesis (B) rapid expansion (C) kinetic energy (D) cramps (E) relaxation (F) fertilization (G) movement (H) sweating
[EX A]:
E