The above figure shows a Boolean function F(A,B,C,D) implemented with a 8-to-1 multiplexer. Each one of the inputs port have been tied to either ground (equivalent to "0"logic), VCC (equivalent to "1" logic) or D variable. The other three variables A,B,C have been tied to the three selector gates of the multiplexer: A is tied to S2 (most significant), B is tied to S1 and C to S0 (least significant). To which of the expressions of F(A,B,C,D) given below correspond the implemenation of the circuit above?

F(A,B,C,D) = AB' + A'D + B' C

F(A,B,C,D) = ABC' +A'D

F(A,B,C,D) = BC' + AD + B'D

None of the above