the statement that best describes the operation of D flip-flop if the clock is a negative-edge-triggered is: a. The Qoutput is always the same as the D input b. The Qoutput is always the same as the Dinput at the positive edge of the clock O c. The logic level at the D input is transferred to Q on negative edge of the Clock O d. The Qoutput is always the same as the clock input if the Dinput equals 1