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 of the following is an example of ecological succession? (A) a group of horses slowly becomes extinct due to loss of habitat (B) a group of rats in a lab learn to navigate a maze (C) a soccer team trains for the championship (D) Trees, insects, and birds in a forest grew from wildfire-ravaged lands
[EX A]: D

[EX Q]: To have energy that will last your whole life you'd buy a (A) car battery (B) loaf of bread (C) turbine (D) tank of gas
[EX A]: C

[EX Q]: As the use of alt bio fuels increases, the use of what will decrease? (A) wind power (B) solar heat (C) hydro-electric power (D) non regenerating fuels
[EX A]:
D