A variation on a theme style and color is a:

Which of the following memory modules is a DDR3 chip?

A. PC3200 B. PC4800 C. PC5300 D. PC8000

What does the following command do with respect to the Amazon EC2 security groups? ec2-revoke RevokeSecurityGroupIngress

A. Removes one or more security groups from a rule. B. Removes one or more security groups from an Amazon EC2 instance. C. Removes one or more rules from a security group. D. Removes a security group from our account.