A.1 B.2 C.3 D.4 E.8
A.A1A0X0+A1A0X1+A1A0X2+A1A0X3 B.A1A0X0 C.A1A0X1 D.A1A0X3
A.B=C=1B.B=C=0C.A=1,C=0D.A=0,B=0