Final answer:
The subject of this question is Video Games and the grade level is High School. The correct answer is Cain's Wandering Eye, a collectible item in the game 'The Binding of Isaac' that provides an additional familiar for the character Cain.
Step-by-step explanation:
The subject of this question is Video Games. The item being described is one of the collectible items in the game 'The Binding of Isaac'. It specifically relates to the character Cain, who is a playable character in the game.
The correct answer is C) Cain's Wandering Eye. This item, when unlocked by defeating Boss Rush with Cain, provides an additional familiar that follows Cain and fires tears in the same direction as Isaac.
Therefore, the subject of this question is video games, specifically 'The Binding of Isaac', and the grade level is high school.