The process of MCS-51 MCU responding to interrupt is ().
选项：

A:The breakpoint PC automatically presses the stack and loads the corresponding interrupt vector address into the PC
B: Turn off the interrupt and the program goes to the interrupt service program
C: The PC points to the interrupt service program address
D: The breakpoint PC automatically presses the stack, loads the corresponding interrupt vector address into the PC, and the program turns to the vector address