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: if a chemical reaction occurs, it might have been triggered by which of these? (A) a person yelling at it (B) a person walking by it (C) a person looking at it intently (D) a person cranking up the room heater

SOLUTION: D

PROBLEM: Consumers eat other what? (A) oxygen (B) animal toys (C) rays (D) weaker bugs

SOLUTION: D

PROBLEM: Ferrous metals can comprise items such as (A) steel clogs (B) gold cats (C) bronze shoes (D) Fe armor

SOLUTION:
D