GMAT Problem Solving (PS) | Re: In a law office with 23 legal secretaries (all of whom are required to

In a law office with 23 legal secretaries (all of whom are required to wear blue or black suits to work), 19 of the secretaries are female. If 2 male secretaries wear blue suits and 12 of the secretaries wear black suits, then how many female legal secretaries wear blue suits?

A. 2
B. 4
C. 9
D. 10
E. 11