Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following 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
Solution: Books are the easiest to stack.
Reason: The answer relates to stacking which is mentioned in the group in the input.

Now, solve this instance: context: A person is trying to roll a ball, a can, a box, and an egg.<sep>group: rolling <sep>question: Which is the hardest to roll?<sep>A: ball<sep>B: can<sep>C: box<sep>D: egg
Student:
The box is the hardest to roll.