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: a seismograph is used for measuring the size of an earthquake, Fact2: When earthquakes occur near cities of any size, the potential for damage is great., Question: A seismograph is used to measure the what of damage done by an occurrence? (A) hail (B) color (C) shape (D) stoma (E) size (F) death (G) attraction (H) homes

Ex Output:
E

Ex Input:
Fact1: Molecules of tRNA bring amino acids to the ribosome in the correct sequence., Fact2: Ribosomes are sites of protein synthesis., Question: Molecules of _ initiate protein synthesis (A) Acids (B) nektar (C) sugar (D) tRNA (E) H 2 O (F) three (G) CO 2 (H) HIV

Ex Output:
D

Ex Input:
Fact1: plucking a string can cause that string to vibrate, Fact2: When the strings on a guitar vibrate, they transmit their vibrations to the saddle., Question: What vibrates the saddle? (A) voltage (B) friction (C) nerves (D) heat energy (E) mechanical (F) plucking (G) energy (H) waves

Ex Output:
F