how long it takes the output to change states after the clock has transitioned.
B.
B) how long the operator has in order to get the flip-flop running before the maximum power level is exceeded.
C.
C) the minimum time required for the control levels to be maintained at the inputs of a flip-flop prior to the triggering edge of the clock in order for data to be reliably clocked into the component.
D.
the maximum time interval required for the control levels to remain on the inputs before the triggering edge of the clock in order for the data to be reliably clocked out of the FF.