The Boolean function $F(A,B,C,D)=Ao+Bo+Co+D=1$ means:

a$.$ All inputs are ones $)=1,B=1,C=1,D=(1$

b$.$ One or two or three of the inputs are ones

c$.$ One or three of the inputs are ones

d$.$ Half of the inputs are zeros $($for example: $A=0,B=0,C=1,D=1)$

e$.$ All inputs are zeros $)=0,B=0,C=0,D=(0$