Dinn's maze performance when assisted by a skilled helper
Explanation:
The zone of proximal development is defined as the distance that exist between the level of actual development obtained from independent problem solving the the potential development level, obtained from solving a problem under guidance by an adult or when collaborating with peers that are capable to solve the problem. Hence to determine the zone of proximal development, Dr Mc Coy must measure Jim’s personal performance on the maze and his maze performance when assisted by a skilled helper.
You shouldn't over continue to play even though it still hurts which gets B out of the way. You don't need to stop playing tennis completely because when you can get better you can play so it's not D. And only playing once a week could still cause injuries.