Given the task definition, example input & output, solve the new input case.
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.
Example: context: A person is trying to stack flowers, eggs, balls, and books.<sep>group: stacking <sep>question: Which is the easiest to stack?<sep>A: flowers<sep>B: eggs<sep>C: balls<sep>D: books
Output: Books are the easiest to stack.
The answer relates to stacking which is mentioned in the group in the input.

New input case for you: context: There are four staircases. The first leads to the top of a microwave, the second leads to the top of a table, the third leads to the top of a car, and the fourth leads to the top of a mountain.<sep>group: height <sep>question: The staircase leading to the top of what is the hardest to walk up?<sep>A: microwave<sep>B: table<sep>C: car<sep>D: mountain
Output:
The staircase leading to the top of the mountain is the hardest to walk up.