Stefan Is Babysitting His Young Niece, Avery, for the First

Multiple Choice

Stefan is babysitting his young niece, Avery, for the first time. Stefan has not seen Avery since the beginning of the semester, and is surprised to find that Avery is speaking much more than she did the last time. Stefan has just been through a lecture on language development, so he thinks this visit will be especially interesting.
-Avery's parents also speak to her in Ukrainian.Avery has been speaking to Stefan in English all evening,but after dinner she suddenly asks him for a "pecivo" (the Ukranian word for cookie) for dessert.Avery used the correct _________,but made __________ error.

A) phonology; an over-extension
B) phonology; a semantics
C) semantics; a bilingualism
D) expression; an over-extension