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: tidal energy can be used to produce electricity, Fact2: Tidal caves are formed by the energy of the rising and falling tides., Question: what can produce electricity? (A) rivers (B) animal transport (C) tidal caves (D) Nematoda (E) rays or beams (F) animals (G) cactuses (H) photons

Ex Output:
C


Ex Input:
Fact1: Evaporation of sweat uses energy, and the energy comes from body heat., Fact2: When sweat comes in contact with the skin it is cooled as the sweat evaporates., Question: energy leaves from what when sweat contacts with skin (A) radiation (B) heat energy (C) expelled (D) vapors (E) body heat (F) heat produced (G) conduction (H) metal

Ex Output:
E


Ex Input:
Fact1: burning wood is used to produce heat, Fact2: Interior woods are birch, spruce and pine., Question: What is burned to produce heat? (A) Oak (B) Gold (C) Spruce (D) cellulose (E) Conifers (F) bamboo (G) Plastic (H) Aluminum

Ex Output:

C