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: heat and pressure change the remains of what into natural gas? (A) leaves (B) cans (C) books (D) cars

SOLUTION: A

PROBLEM: Viruses are killed by objects used in a (A) backyard (B) bathroom (C) kitchen (D) living room

SOLUTION: C

PROBLEM: Quartz are in (A) affection (B) hollow spaces (C) love (D) spices

SOLUTION:
B