Set-up time specifies ________. (Multiple Choice)

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