If Children Follow Marcus's "Rule-And-Memory" Theory for Creating the Plural

If children follow Marcus's "rule-and-memory" theory for creating the plural form of nouns, we would expect that English-speaking children would

A) add the ending "s" or "es" to every noun.
B) vary the strategy for creating a plural form, and then notice which strategy receives the most positive reaction from grownups.
C) add "s" or "es" to most nouns, but remember some important words that have an irregular plural.
D) use overextensions more frequently than overregularizations.