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: extreme heat and pressure change rock into metamorphic rock, Fact2: Slate is a metamorphic rock., Question: What rock is formed by extreme heat and pressure (A) erosion (B) crust (C) calcite (D) Slate (E) dead (F) forces (G) fibrous (H) complex
[EX A]: D

[EX Q]: Fact1: Earth 's tilt on its rotating axis causes seasons to change, Fact2: Weather changes from season to season., Question:  Earth 's tilt on its rotating axis causes changes in what (A) weather (B) sunlight (C) Joules (D) wind (E) heat (F) climate (G) energy (H) earth
[EX A]: A

[EX Q]: Fact1: electrical current running through a wire causes that wire to heat up, Fact2: Then the total current and Joule heating are solved., Question: Electrical current running through a wire causes an increase in what? (A) warmth (B) speed (C) Joules (D) water current (E) energy (F) toughness (G) distance (H) lightning
[EX A]:
C