Given the task definition and input, reply with output. The task is about reading the given context, group and MCQs and then generating answers from the given input. MCQs are multiple choice questions in which a question is asked and few options are given, among which one or in some cases more than one can be the answer.

context: A person is trying to move a pile of books, a pile of salt, a pile of blocks, and a pile of balls from one side of a room to the other using only one hand.<sep>group: grasping <sep>question: Which pile is the hardest to move?<sep>A: books<sep>B: salt<sep>C: blocks<sep>D: balls

The pile of books is the hardest to move.