Answer:
A or C
Explanation:
C because it is to moltiple readers
A because it could be to the one person
Because, their discussion should be exact
D. Asking hs peers to explain their reasoning, listening closely, and then giving his view.
This is the proper way to respond to ideas which a person does not agree with, in a group discussion as it gives respect to both parties, and lets both of them learn why one view is given versus another.