If your new kernel does not behave normally after a routine kernel upgrade, chances are that you forgot to _______ before compiling the new kernel.

A.
make clean

B.
make shot

C.
make clear

D.
make remove

Explanation:
If your new kernel does really weird things after a routine kernel upgrade, chances are you forgot to make clean before compiling the new kernel. Symptoms can be
anything from your system outright crashing, strange I/O problems, to crummy performance. Make sure you do a make dep, too.