Sonnenschein's (1986) Study Suggests That

Sonnenschein's (1986) study suggests that:

A) Children aged 6 years and below understand that they need to provide more information to a listener who lacks shared knowledge, but they seem not to understand what kind of additional information is required
B) Children aged 6 years show no signs of the informational requirements of the listener. The findings lend compelling support to Piaget's claim that young children are egocentric
C) Children aged 6 years and below show an impressive level of insight into both how much information to convey to a listener and what kind of information to convey
D) Children aged 6 years adapt their communication to the informational needs of the listener so long as they understand the purpose of the experiment; if they do not understand the purpose, they are liable to appear egocentric
E) Even children aged 10 years are sometimes egocentric in their speech