Muzafer Sherif Conducted a Study Where He Had Participants Estimate

Muzafer Sherif conducted a study where he had participants estimate how far a light 'moved' in a dark room.Initially,people provided varied estimates.However,after placing participants together in the dark room he found that after several trials there estimates began to converge.What did he find happened to participant's estimates after testing them again individually?

A) Participants' estimates began to vary widely again.
B) Participants' estimates were much lower than those initially provided.
C) Participants' estimates were much lower than the group estimate.
D) Participants' estimates continued to be consistent with the group estimate.