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.

[EX Q]: context: A person is trying to bounce a rubber ball. They drop a first ball onto grass, a second ball onto rubber, a third ball onto concrete, and a fourth ball onto steel.<sep>group: bouncing
[EX A]: question: Which ball bounces the least?<sep>A: grass<sep>B: rubber<sep>C: concrete<sep>D: steel

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

[EX Q]: context: A person is trying to bounce a rubber ball. They drop a first ball onto rubber, a second ball onto foam, a third ball onto steel, and a fourth ball onto concrete.<sep>group: bouncing
[EX A]:
question: Which ball bounces the least?<sep>A: rubber<sep>B: foam<sep>C: steel<sep>D: concrete