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: Four balls are dropped. The first is dropped from the height equivalent of a book, the second is dropped from the height equivalent of a table, the third is dropped from the height equivalent of a house, and the fourth is dropped from the height equivalent of a mountain.<sep>group: height <sep>question: The ball dropped from the height of what takes the longest amount of time to fall?<sep>A: book<sep>B: table<sep>C: house<sep>D: mountain

The ball dropped from the height of the mountain takes the longest amount of time to fall.