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: Aging is associated with the death of cells., Fact2: When telomeres become too short, the cell dies., Question: What is associated with aging? (A) Extra cells (B) intelligence (C) forest is destroyed (D) Chemical energy (E) Strong cells (F) oxidation reaction (G) Short telomeres (H) massive damage

Ex Output:
G


Ex Input:
Fact1: when a metal rusts , that metal becomes orange on the surface, Fact2: Cast-iron and steel surfaces are susceptible to corrosion in the form of rust., Question: Cast-iron and steel surfaces are susceptible to becoming what on the surface? (A) hardness (B) solid (C) irritants (D) acids (E) orange (F) heat (G) Unsafe (H) damaging

Ex Output:
E


Ex Input:
Fact1: Flowing water can slowly dissolve carbon in sedimentary rock., Fact2: Water falls from the sky and flows downhill due to the force of gravity., Question: What moving downhill due to the force of gravity can dissolve carbon in sedimentary rock? (A) river (B) Raft (C) pebbles (D) rain (E) water (F) sand (G) oxygen (H) craters

Ex Output:

E