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: decomposition increases amount of organic matter in soil, Fact2: Fungi are involved in decomposition, as well., Question: What can help increase the amount of organic matter in soil?  (A) Fungi (B) mussels (C) pine (D) worms (E) animals (F) Enzymes (G) solutes (H) trees

Ex Output:
A


Ex Input:
Fact1: erosion causes a river to become deeper and wider, Fact2: Weathering and erosion continue to shape it today., Question: Weathering causes what to become deeper and wider? (A) a landslide (B) Sediment (C) a mountain (D) a volcano (E) soils (F) rock (G) flooding (H) a river

Ex Output:
H


Ex Input:
Fact1: a delta is formed by deposition of sediment at the mouth of a river by water fanning out, Fact2: Sometimes the water of the Ganges mixes with the current of the river Saraswati., Question: What is formed by sediment being deposited at its mouth by water fanning out? (A) waterfalls (B) rivers (C) detritus (D) soils (E) deltas (F) soft soil (G) lagoons (H) Rocks

Ex Output:

E