What Important Conclusion Did George Miller Draw After Becoming Familiar

What important conclusion did George Miller draw after becoming familiar with Noam Chomsky's theory of language?

A) that English is a particularly difficult language for children to learn
B) that the most elementary unit of speech is the word
C) that a child picks up the rules of grammar by trial-and-error learning
D) that behavioristic learning theory could not account for a child's acquisition of grammar