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: Plants live just about everywhere on Earth., Fact2: Epiphytes are plants that live on other plants., Question: Where do epiphytes live? (A) swamp vegetation (B) mountains (C) vegetation (D) the environment (E) peachleaf willow (F) ice (G) rocks (H) everywhere on earth
H

Fact1: insulated material can be used for keeping warm, Fact2: An insulated cup with a cover is great for keeping beverages warm., Question: How do you keep a cup hot? (A) less water (B) electricity (C) heat energy (D) adding heat (E) energy usage (F) insulation (G) squeeze (H) energy
F

Fact1: Antigens are found on cancer cells and the cells of transplanted organs., Fact2: ALL proteins are antigens., Question: What can be found on cancer cells? (A) acetic acid (B) Allergies (C) bacteria (D) parasites (E) fever (F) PDAs (G) proteins (H) bioaerosols

G