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").

If one mineral can scratch another mineral then that other mineral is softer than that one mineral, as can be tested with (A) a diamond and steel (B) a rock and glass (C) a diamond and agate (D) a ruby and salt
C

A rabbit might die if (A) it has insufficient money to buy food (B) all the greenery was burned in a fire (C) all of the rabbit's prey has disappeared (D) all the other rabbits shun it
B

December is in the summer in what (A) the southern part of cities (B) the northern part of Earth (C) the southern part of the third rock (D) the southern part of every rock

C