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.
Q: context: A person is trying to stack books, lamps, flowers, and balls.<sep>group: stacking <sep>question: Which are the easiest to stack?<sep>A: books<sep>B: lamps<sep>C: flowers<sep>D: balls
A: 
The books are the easiest to stack.