which of the following commands is used to activate the new partition?

A server requires more swap space. A new swap partition is created at /dev/sdb2 using fdisk. After editing the configuration, which of the following commands is used to activate the new partition?

A.
mkfs -swap

B.
mount -t vfs /dev/sdb2

C.
swapon -a

D.
sfdisk /dev/sdb2