please i need help with these questions!! thank you in advance

a) A gated D latch b) A positive edge triggered D-type flip-flop c) A negative edge triggered D-type flip-flop d) All of the above e) None of the above Which of the following is the correct truth table for the circuit shown below: CD CD+C CD+C a) b) d) \begin{tabular}{lll|l} x & y & z & f \\ 0 & 0 & 0 & 1 \\ 0 & 0 & 1 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 1 & 1 & 1 \\ 1 & 0 & 0 & 0 \\ 1 & 0 & 1 & 1 \\ 1 & 1 & 0 & 1 \\ 1 & 1 & 1 & 0 \end{tabular}