What command changes the priority of the process running with process id of 12345 to the highest priority?

A.
/usr/bin/renice +20 12345

B.
/usr/bin/renice -20 12345

C.
/bin/setpriority +20 12345

D.
/bin/setpriority -20 12345

Explanation:
To change the priority of running process use the renice command. Default priority is 0, highest priority is -20 and lowest priority is 19. The path of renice command is /usr/bin/renice.