digital electronics and logic design

Which one is the simplified form of F(A,B,C,D) = (6,7, 12) with the don't care conditions d(A,B,C,D)= E(9, 13, 14, 15) Select one: O a. F(A,B,C,D) = B(C' + D) O b. F(A,B,C,D) = (A + D)B O c. F(A,B,C,D) = B(C+D) O d. F(A,B,C,D) = (A + C')B