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: Gymnosperms are vascular plants that produce seeds in cones., Fact2: Plants reproduce by seeds and rhizomes., Question: What do gymnosperms use to reproduce? (A) roots (B) cones (C) ovaries (D) family (E) CO 2 (F) instinct (G) embryos (H) Mitosis

Ex Output:
B

Ex Input:
Fact1: Plants use cellulose for their cell walls., Fact2: Green bean plantings continue to be planted., Question: What do green beans use for their cell wall? (A) Energy (B) cellulite (C) cellular (D) cellolosis (E) cellulose (F) lmestone (G) layers of fat (H) heat energy

Ex Output:
E

Ex Input:
Fact1: chlorophyll is used for absorbing light energy by plants, Fact2: Chlorophyll is the plant's oxygen producer., Question: plants absorb what to produce oxygen? (A) water (B) carbon dioxide (C) light energy (D) The atmosphere (E) water vapor (F) nitrogen (G) air (H) nutrients

Ex Output:
C