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 Input:
Fact1: Wings are part of the exoskeleton and attached to the thorax., Fact2: Insect wings are attached to the dorsal side of their thorax., Question: What side of an insect are wings attached to? (A) white (B) dorsal (C) protected (D) abdomen (E) elytra (F) three (G) strong (H) tail

Ex Output:
B

Ex Input:
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 Output:
A

Ex Input:
Fact1: riding a bike does not cause pollution, Fact2: Carbon monoxide is, of course, an air pollutant., Question: what doesn't riding a bike cause? (A) Allergies (B) harmful substances (C) Decrease bodily water (D) Greenhouse gasses (E) carbon monoxide (F) global warming (G) Dehydration (H) chemical changes

Ex Output:
E