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").

Adding something poisonous to an environment and harming it is called what? (A) dirtying (B) liking (C) cleaning (D) observing
A

Factories often add something to the environment that is (A) helpful (B) productive (C) sanitizing (D) posionous
D

Which of the following make sustainable, long term energy? (A) fossil fuels (B) windmills (C) coal mining (D) fracking

B