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.

Let me give you an 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
The answer to this example can be: Books are the easiest to stack.
Here is why: The answer relates to stacking which is mentioned in the group in the input.

OK. solve this:
context: A person is trying to stack blocks, books, flowers, and coins.<sep>group: stacking <sep>question: Which are the hardest to stack?<sep>A: blocks<sep>B: books<sep>C: flowers<sep>D: coins
Answer:
The flowers are the hardest to stack.