A Windows User Is Attempting to Exit a Locked Up

Multiple Choice

A Windows user is attempting to exit a locked up desktop application that is not responding to mouse or keyboard input.  
Which of the following steps can be taken to end the application process without exiting other open applications?

A) Restart Windows and relaunch the application to verify it will launch.
B) Open Task Scheduler and end the scheduled task associated with the application.
C) Open Task Manager and end the process associated with the application.
D) Press the computer power button and hold it for five seconds.