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").

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

A: D
****
Q: Which of the following relationships is true? (A) Play-Doh can scratch diamond, therefore it is softer (B) Diamond can scratch Play-Doh, therefore Play-Doh is harder (C) Diamond can scratch Play-Doh, therefore diamond is harder (D) Play-Doh can scratch diamond, therefore it is harder

A: C
****
Q: Plants preparing for dormancy is a sign (A) the earth is tilting (B) readiness an total alertness (C) extreme fatigue and tiredness (D) of a beautiful sunset

A:
A
****