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: a seismograph is used for measuring the size of an earthquake, Fact2: Magnitude a measure of earthquake size., Question: Seismographs measure what aspect of earthquakes? (A) Major effects (B) magnitude (C) Otoacoustic (D) power (E) classified (F) specialized (G) lifespan (H) their speed
B

Fact1: wind and rain cause erosion, Fact2: Water, in the form of rain, is the most effective agent of erosion., Question: What causes erosion the most? (A) streams (B) motion (C) LEDs (D) water (E) Roads (F) rivers (G) Winter (H) wind
D

Fact1: Most carcinogens cause cancer by producing mutations in DNA., Fact2: DNA DNA is deoxyribonucleic acid., Question: Most carcinogens can cause cancer by causing mutations to what? (A) that material's properties (B) dexyribonucleic acid (C) Veins and arteries. (D) Chlorophyll (E) harmful substances (F) properties (G) a lot of human deaths (H) characteristics

B