Use the SM chart to calculate the Ds input for FF B$.$ Select the correct un$-$simplified answer.

Use the State Machine Chart for a problem with one input $x$ and one output $2,$ where $Z=1$ only when the

sequence $"0101"$ occurs. Network allows overlapping targets and does not reset on inputs that break a

possible sequence but preserves any partial possible sequence. Flip Flops A and $B$ are used to hold the

Present State as coded on the state box. Use a Mealy Machine.

A$)A^{\text{'}}{B}^{\text{'}}{x}^{\text{'}}+A^{\text{'}}B{x}^{\text{'}}+AB{x}^{\text{'}}+A{B}^{\text{'}}{x}^{\text{'}}$

B$)A^{\text{'}}{B}^{\text{'}}{x}^{\text{'}}+A^{\text{'}}B{x}^{\text{'}}+A{B}^{\text{'}}x$

C$)AB{x}^{\text{'}}+A^{\text{'}}{B}^{\text{'}}{x}^{\text{'}}+A{B}^{\text{'}}x$

D$)A^{\text{'}}B{x}^{\text{'}}+A{B}^{\text{'}}{x}^{\text{'}}+A{B}^{\text{'}}x|$