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: The cultivation of a range of crop types in a specific order has a positive impact on (A) soil quality (B) water quality (C) air quality (D) atmospheric conditions

A: A
****
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: A source of pollution might be (A) recycling glass and plastic (B) creating a new use for old glass (C) throwing plastic in the pacific (D) finding a new use for old clothes

A:
C
****