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