Answer:
Based on the concept of groupthink, what is the most likely response of Ralph's group to the new member's proposal: Reject the old method
Step-by-step explanation:
In the concept of group think Rejecting old method refers to the action that's deviating from pre-existing culture/schema that the group is usually hold. (the deviation usually made as an effort to adapt to new situation or as an effort to make improvements for the group)
In this particular context, the new method of juggling is what considered to be the deviation.