Maura Is 10 Years Old and Is Starting to Exchange

Maura is 10 years old and is starting to exchange e-mails with her older sister, Suzanne, who is away at college.
-Suzanne had never seen the "Really happy!" emoticon before -- so she sent one back to say she is confused. Her emoticon looked like ____.

A) ;-)
B) :-?
C) :-)
D) :-D