In the $\_\_\_\_\_\_\_\_$ phase of an instruction, first the contents of the PC are copied to $\_\_\_\_\_\_.$ Then the $\_\_\_\_\_\_\_\_$ signal is sent to memory. Update $\_\_\_\_\_\_\_$ with the contents from $\_\_\_\_\_\_\_\_.$ The last step is to increase the $\_\_\_\_\_\_.$

Fetch, Memory, Read, IR$,$ MAR, PC

Fetch, MAR, Read, IR$,$ MDR$,$ PC

Execute, Registers, Fetch, MAR, PC$,$ MAR

Decode, IR$,$ Write, MAR, PC$,$ MDR