Q: 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 seismometer is used to measure the strength or magnitude of an earthquake, Fact2: The Richter scale provides information on the magnitude or inherent strength of the earthquake., Question: what is a seismometer used to measure? (A) Major effects (B) a triatomic oxygen hole (C) Richter constant (D) the richter scale (E) vibration (F) 70-75 degrees Fahrenheit (G) occurs over a wide range (H) weight of food
A:
D