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

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

[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 carpet, and a fourth ball onto grass.<sep>group: bouncing
[EX A]:
question: Which ball bounces the highest?<sep>A: rubber<sep>B: foam<sep>C: carpet<sep>D: grass