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: a seismometer is used to measure the strength or magnitude of an earthquake, Fact2: Earthquakes are measured on a scale of 1 to 10., Question: How do we grade earthquakes (A) Seisometers (B) Cladistics (C) feedback (D) Measuring the ground (E) Check out the sky (F) classified (G) Taking temperature (H) the Himalayas
[EX A]: A

[EX Q]: Fact1: Steroid hormones are made of lipids, such as phospholipids and cholesterol., Fact2: Fats are known as lipids., Question: What are steroid hormones made of? (A) bacteria (B) fats (C) sugar (D) muscle (E) H 2 O (F) sunlight (G) the Sun (H) SO2
[EX A]: B

[EX Q]: Fact1: Cells secrete acids and bases to maintain the proper pH for enzymes to work., Fact2: Enzyme systems efficiency is pH dependant., Question: Cells secrete acids and bases to maintain enzyme systems what? (A) breakdown (B) failure (C) efficiency (D) it needs them (E) kinetic (F) health (G) distractions (H) state
[EX A]:
C