Final answer:
A. kill -9 1357. The command to kill a process with process ID 1357 is 'kill -9 1357.' This command forcefully terminates the process by sending the SIGKILL signal. The mention of /dev/null in the question is not relevant to the process termination.
Step-by-step explanation:
The command used to send a process's resources to /dev/null is fundamentally misunderstood in the question. The action of sending a process's resources to /dev/null generally means redirecting the output of a process to nowhere, which makes the output disappear.
However, this is not the same as killing a process. To kill a process with process ID 1357, you would use the kill command along with the appropriate signal. The kill command sends a signal to the process, and the most common signals are TERM (15) which asks the process to terminate gracefully, and KILL (9) which forcefully kills the process.
If you wish to terminate the process with the process ID 1357 forcefully, the correct command would be A. kill -9 1357. This command sends the SIGKILL signal to the process, which cannot be caught, blocked, or ignored, and thus forces the process to end immediately.
It's similar to pulling the plug on a running device, and should be used when a process cannot be terminated with the SIGTERM signal. Note that the concept of sending process resources to /dev/null does not apply to killing a process and seems to be a confusion with redirecting output to /dev/null, which is done using shell redirection operators.