TASK DEFINITION: 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").
PROBLEM: Which is likely true? (A) two negatively charged iron ingots pull together (B) two negatively charged lemons pull together (C) two negatively charged rats pull together (D) two negatively charged dogs pull together

SOLUTION: A

PROBLEM: Quartz can very easily damage (A) smelted silica (B) granite (C) diamonds (D) steel

SOLUTION: A

PROBLEM: Which is true? (A) balloons and stars are composed of exactly the same materials (B) balloons and stars are the same size (C) stars and balloons share some of the same gases (D) balloons and stars contain sodium

SOLUTION:
C