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").

Fact1: mechanical weathering is when rocks are broken down by mechanical means, Fact2: Pysical weathering is the mechanical breakdown of rocks., Question: What is when rocks are broken down? (A) roof weathering (B) Plant growth is reduced (C) brick weathering (D) Physical weathering (E) remains of prehistoric life (F) at or near the margins (G) home weathering (H) major threat to health
D

Fact1: wiring requires an electrical conductor, Fact2: Wires connected to a source of electricity., Question: An electrical conductor is required for the operation of: (A) water current (B) electricity (C) satellites (D) energy (E) to move people (F) gas lamps (G) trains (H) lightning
B

Fact1: ice wedging is when ice causes rocks to crack by expanding in openings, Fact2: Water expands as it freezes into ice., Question: How does water crack rocks? (A) Turning to silt (B) bottom of feet (C) Turning to ice (D) Getting hot (E) erosion (F) Mixing with salt (G) lowered energy cost (H) Movement

C