Some boys and girls were having a car wash to raise money for a class trip. Initially, \(\frac { 2 } { 5 } \) of the group were girls. Shortly thereafter two girls left and two boys entered, then \(\frac { 1 } { 3 } \) of the group are girls. How many girls were initially in the group?
(A)8 (B)10 (C)12 (D)14 (E)20
C