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: lakes are formed by precipitation and runoff, Fact2: Runoff from precipitation is a natural part of the water cycle., Question: What are some of the steps that forms a lake? (A) decomposition and respiration (B) storing water (C) photosynthesis and solar energy (D) near the shoreline (E) precipitation and run-off (F) perspiration and excretion (G) The area was once underwater (H) At the peak of a mountain

Ex Output:
E

Ex Input:
Fact1: a breathing mask is used for keeping harmful particles from entering the respiratory system, Fact2: Pulmonologists treat lungs and respiratory systems., Question: what does a breathing mask keep harmful particles from entering? (A) skin (B) tissue (C) stomach (D) h2o (E) H20 (F) air (G) lungs (H) gas masks

Ex Output:
G

Ex Input:
Fact1: a stem is used to store water by some plants, Fact2: Stems Stems are the support structures of a plant., Question: Where is water stored in a plant? (A) dormant state (B) at or near the margins (C) colder and wetter (D) the support structure (E) it keeps an organism warm (F) they body they live in (G) It remains dormant (H) excretory structures

Ex Output:
D