You will be given a definition of a task first, then some input of the task.
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").

Fact1: Sponges are filter feeders., Fact2: Since mussels are filter-feeders, they clean water as they feed., Question: What do sponges clean? (A) reefs (B) trees (C) aquatic (D) matter (E) dirt (F) retina (G) snails (H) water
Output:
H