By the Age of Six, the Average Child ____

Multiple Choice

By the age of six, the average child ____.

A) has a vocabulary of around 1,000 words, but not a good sense of grammar rules
B) is in the midst of using holophrases and telegraphic speech as his or her primary form of language
C) has a vocabulary of around 10,000 words and a fairly competent mastery of grammar
D) has just recently stopped using underextensions and overextensions in his or her language