Assuming the directory /swapdir exists, what is the result of executing the following command? # mkfile 100m /swapdir/file1

A.
A 100 megabyte swap file named /swapdir/file1 is created.

B.
A 100 megabyte swap file named /swapdir/file1 is added to the existing swap space.

C.
The size of the existing swap partition is increased by 100 megabyte using a file named /swapdir/file1.

D.
This command fails, because swap space can be created only during the initial installation of the operating system.