Children's Overregularization Errors Are an Indicator That They

Children's overregularization errors are an indicator that they:

A) use words they are able to produce in place of those they are not yet able to produce.
B) internalize grammatical rules.
C) are able to remove the nonessential elements of speech to reduce the number of words per utterance.
D) memorize the plural forms of individual nouns and the tenses of individual verbs.
E) make random guesses about the structures of words.