Which Example Illustrates an Overextension

Multiple Choice

Which example illustrates an overextension?

A) Julia uses the word cup for any container that holds liquid, including vases and birdbaths.
B) Elizabeth substitutes easier sounds for ones that are hard to say, such as tuck for stuck.
C) Eddie expresses his desire for his parents to read to him by using a single word, book.
D) Robbie leaves out difficult parts of words, as when he uses tend for the word pretend.