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 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
[EX A]: C

[EX Q]: When a squid moves forward, water is (A) pushed directly behind it (B) pushed up and below it (C) evaporated by salt water (D) pushed in front of it
[EX A]: A

[EX Q]: Using trash in the way it was used in the last scene of the 'Back to the Future' movie is, most ideally, an example of: (A) creative filming (B) an alternative fuel (C) wishful thinking (D) cleaning the environment
[EX A]:
B