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: most canyons are formed by flowing rivers through erosion over long periods of time, Fact2: Canyon formed as a consequence of river erosion., Question: what does erosion form? (A) valleys (B) Sediment (C) mountains (D) canyons (E) soils (F) hills (G) soft soil (H) loose soil

Ex Output:
D


Ex Input:
Fact1: Blood pressure is highest in arteries and lowest in veins., Fact2: Blood Pressure Blood Pressure Blood pressure is the force of the blood on the artery walls., Question:  is highest in arteries and lowest in veins. (A) matter (B) voltage (C) Length (D) solutes (E) glucose (F) measure (G) Force (H) Joules

Ex Output:
G


Ex Input:
Fact1: measuring the hardness of minerals requires scratching those materials, Fact2: Diamonds are so hard because of the shape of a diamond's structure., Question: What can you scratch to measure? (A) stoma (B) bone (C) yardsticks (D) diamonds (E) rulers (F) distance (G) hairs (H) measuring tape

Ex Output:

D