Which of the Following Best Summarizes the Conclusions of Kraus

Which of the following best summarizes the conclusions of Kraus and Glucksberg's research as to why preschool children and kindergarteners communicate in an ineffective fashion?

A) They tend to describe the stimuli in highly idiosyncratic ways.
B) They tend to call more than one stimulus by the same name.
C) They tend to be overly elaborate, creating stories that include a great deal of irrelevant information.
D) They tend to be unaware that they must say something, so they tend to say nothing.