Briefing Amazon Knowledge

What does the following command do with respect to the Amazon EC2 security groups?

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.