George uses the word "more" to mean "I want another cookie." In this case,"more" is a(n) :

A) holophrase.
B) preverbal communication.
C) overextension.
D) reflexive communication.

Holophrase

A single word that conveys a complex idea or sentence, commonly used by infants in the early stages of language development.

Preverbal Communication

The exchange of messages or information without the use of spoken language, observed primarily in infants and young children before they develop verbal skills.

Overextension

In language development, the application of a word in a broader context than is appropriate, common among young children learning to speak.