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 Q]: Fact1: when a body of water receives more water than it can hold , a flood occurs, Fact2: Flood probability is based on past floods., Question: How do we determine the probability of receiving more water than a body can hold? (A) evaporation (B) climate (C) The past (D) watershed (E) Dilution (F) energy usage (G) Temperature (H) salinity
[EX A]: C

[EX Q]: Fact1: a fire requires oxygen to burn, Fact2: In the vacuum of space, there's no oxygen to burn., Question: Where is fire impossible? (A) evaporation (B) In space (C) A computer (D) uncontrolled (E) Inside a car (F) On television (G) summer end (H) On a mountain
[EX A]: B

[EX Q]: Fact1: Bone is less flexible than cartilage but stronger., Fact2: Sharks have a cartilage skeleton., Question: What are less flexible than shark skeletons but stronger (A) holding nutrients (B) tissue paper (C) calibrated (D) plant stems (E) close relatives of coral (F) regular skeletons (G) clay (H) dermal & vascular tissue
[EX A]:
F