Answer: It has been found in research that 'Schemas link to the development and strengthening of cognitive structures (the basic mental processes people use to make sense of information) in the brain. Children are able to act out experiences and take risks, testing out and talking about what they already know and can do.
All of the other answers could lead to arguments and one-sided group discussions. D makes the discussion more open to everybody answering, open-minded, and cooperative.
