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 concrete, a second ball onto brick, a third ball onto asphalt, and a fourth ball onto carpet.<sep>group: bouncing
[EX A]: question: Which ball bounces the least?<sep>A: concrete<sep>B: brick<sep>C: asphalt<sep>D: carpet

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

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