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]: It is possible to renew (A) sunflowers (B) oil (C) steel (D) stones
[EX A]: A

[EX Q]: A person can inflate a beach ball using (A) a salt shaker (B) several cups (C) live bees (D) organ processed gas
[EX A]: D

[EX Q]: Acid rain may effect things in ways such as (A) causing grass to grow greener (B) creating craters in mountains (C) turning city streets to slush (D) marine life becomes inedible
[EX A]:
D