Five girls and seven boys have been nominated to participate in the spelling bee. Two of the girls and five of the boys are in Ms. Maxwell's class, and the rest are in Mr. Tate's class. All of their names are placed in a bowl and one student is chosen to spell the first word. What is the probability that the first speller will be from Mr. Tate's class if she is a girl?
A. 3/5
B. 5/12
C. 3/12
D. 1/12