What does the following command do with respect to the …

What does the following command do with respect to the Amazon EC2 security groups?
ec2-create-group CreateSecurityGroup

A.
Groups the user created security groups in to a new group for easy access.

B.
Creates a new security group for use with your account.

C.
Creates a new group inside the security group.

D.
Creates a new rule inside the security group.