Time left 1:48:26 Question 21 Not yet answered When an interrupt occurs, which of these functions would be the last to occur? Marked out of 1.00 P. Flag question O a. The registers are restored by popping their values off of the stack O b. The program counter and other registers' values are pushed onto the stack OC The interrupt service routine executed O d. The processor identifies the source of the interrupt TV TOSHIBA