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]: Which sustains life yet stopped growing? (A) air (B) a bush (C) a rock (D) a felled tree
[EX A]: D

[EX Q]: An example of an instinctive behavior is (A) doing a cartwheel outside (B) singing on a stage (C) eating a large pizza (D) a mother feeding the kids
[EX A]: D

[EX Q]: Oak tree seeds are planted and a sidewalk is paved right next to that spot, until eventually, the tree is tall and the roots must extend past the sidewalk, which means (A) roots may fall apart (B) roots may begin to die (C) parts may break the concrete (D) roots may be split
[EX A]:
C