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]: a student leaves a nail line on a mineral sample, so that mineral can be described as what? (A) a mineral (B) a soft mineral (C) a liquid mineral (D) a mineral melt
[EX A]: B

[EX Q]: Which is likeliest to let a spark pass through? (A) a wool sweater (B) a t shirt (C) a rubber eraser (D) a soda can
[EX A]: D

[EX Q]: A person has a glass of water and a friend pranks them by making their water taste different. They prankster added (A) ice (B) water (C) soda (D) air
[EX A]:
C