In One Experiment, Children Were Asked to "Argue" with a Puppet

In one experiment, children were asked to "argue" with a puppet by transforming all the puppet's statements into negative forms.What were the results of this experiment?

A) Children did not use negative auxiliaries correctly until the elementary school years.
B) Preschoolers could convey nonexistence but not denial or rejection.
C) Most preschoolers could use a wide variety of negative auxiliaries.
D) Preschoolers could convey denial or rejection but not nonexistence.