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: A tone is made when a hammer makes contact with (A) a waterfall (B) air (C) an solid object (D) a log

SOLUTION: C

PROBLEM: Which can be used to pass information from one person to another? (A) an invention by Marconi (B) an invention by Newton (C) an invention by McCormick (D) an invention by Pasteur

SOLUTION: A

PROBLEM: Which of these could be a reason why the stars seem to be in a different place at dusk than at dawn? (A) rotation of the sky (B) rotation of the sun (C) rotation of the earth (D) rotation of the person

SOLUTION:
C