ATMEGA328p MCU used. For reference. Which statements are correct in terms of interrupts on MCUs

Select the correct statement(s) regarding interrupts on MCUs Excessive interrupts or long Interrupt Service Routines can slow down the execution speed of a relatively long program. Polling techniques are considered to be a prefered programming practice and should be used whenever possible as a substitute to the use of interrupts. When an explicit hardware condition occurs, the content of the Program Counter (PC) is pushed to the stack, an Interrupt Service Routine (ISR) is executed and then the PC is popped from the stack, returning to the next line of the program's code to execute. Interrupt Service Routines will not execute unless the cli() command is called first, unless the TCNTO register's TFRIO flag is set. When an interrupt is triggered, the processor clock is halted and the related Interrupt Service Routine (ISR) is executed. Once the ISR is completed, the processor clock is restarted and the program continues as before