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

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

[EX Q]: 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 leaves.<sep>group: bouncing
[EX A]:
question: Which ball bounces the highest?<sep>A: foam<sep>B: grass<sep>C: leaves<sep>D: brick