Creating a multiple-choice question from the given context and a 'group' which indicate the focus of the question. The question must come first, separated by <sep> from the candidate answers. The answer to the question does not have to exist in the context.

Let me give you an example: context: A person is trying to roll an apple, a ball, a block, and a bottle. <sep>group: rolling
The answer to this example can be: question: Which is the hardest to roll? <sep>A: apple 	B: ball 	C: block 	D: bottle
Here is why: The MCQ question is asked regarding rolling of the objects and options of the question are present in the context.

OK. solve this:
context: A person is trying to bounce a rubber ball. They drop a first ball onto brick, a second ball onto foam, a third ball onto grass, and a fourth ball onto snow.<sep>group: bouncing
Answer:
question: Which ball bounces the highest?<sep>A: foam<sep>B: grass<sep>C: snow<sep>D: brick