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: fog is formed by water vapor condensing in the air, Fact2: Water vapor rises into the atmosphere., Question: what does the atmosphere do before turning into fog (A) adapt (B) rest (C) Rise (D) fall (E) cooled (F) snow (G) swirl (H) Lift

Ex Output:
C

Ex Input:
Fact1: Annelids have the amazing capacity to regrow segments that break off., Fact2: Earthworms Earthworms are in the phylum Annelids., Question: _ have the amazing capacity to regrow segments. (A) ferns (B) arachnids (C) roots (D) earthworms (E) anthropods (F) crustacean (G) loose soil (H) root growth

Ex Output:
D

Ex Input:
Fact1: a seismograph is used for measuring the size of an earthquake, Fact2: Richter magnitude is a measure of the size of the earthquake., Question: what is a seismograph used for measuring? (A) Differences in speed (B) hurricane speed (C) occurs over a wide range (D) Major effects (E) eruptive products (F) Richter magnitude (G) 70-75 degrees Fahrenheit (H) vertebrae or backbone

Ex Output:
F