In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

[EX Q]: What does gravity cause substances on a planet? (A) things to move sideways (B) things to be moved upwards (C) things to descend to the lowest surface possible (D) things to stay in the same place
[EX A]: C

[EX Q]: if a person wanted to hunt down some deer, which of these would be the wrong place to visit? (A) the local hunting reservation (B) a known national reservation (C) an uncharted wilderness region (D) a natural unregulated forest
[EX A]: B

[EX Q]: Sometimes birds (A) dance to attract predators (B) hide seeds from other birds by burying them (C) hide seeds in hollow trees to eat during the winter (D) cause the spread of plants by pooping hard objects found in fruit
[EX A]:
D