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").

[Q]: Fact1: a graduated cylinder is used to measure volume of a liquid, Fact2: Volume is typically measured in liters or milliliters., Question: What could be used to to measure how many milliliters something is? (A) solid, liquid, gas (B) A graduated cylinder (C) objects that have mass (D) an electron microscope (E) The bending of a ray of light (F) deoxyribonucleic acid (G) a hydraulic system (H) microscope
[A]: B

[Q]: Fact1: Antigens are molecules that the immune system recognizes as foreign to the body., Fact2: Antigens prompt the body to produce antibodies., Question: Antigens are molecules that prompt the what of antibodies? (A) termination (B) failure (C) humans (D) decrease (E) production (F) anemia (G) rapid expansion (H) kinetic
[A]: E

[Q]: Fact1: erosion can cause a landslide, Fact2: Landslides Seismic vibration is a common triggering mechanism for landslides., Question: What can cause seismic vibrations, which are triggering mechanisms? (A) wind (B) erosion (C) vehicles (D) flooding (E) waves (F) rivers (G) energy (H) mines
[A]:
B