Which example correctly uses a subordinate clause?
A. We will go to the bookstore after lunch; unless you went there already.
B.I am planning on taking a cruise with my best friends. Whom I met in college when we lived in the same dorm
C.Since I spent my summer practicing the saxophone I moved up to first chair for the upcoming school year.
D.When that runner puts her mind to it, she can outrun anyone in her class.