Can a User Depict CloudWatch Metrics Such as CPU Utilization

Can a user depict CloudWatch metrics such as CPU utilization in % and Network I/O in bytes on a single graph?

A) No, a user cannot graph two separate metrics on the same graph.
B) Yes, a user can graph several metrics over time on a single graph.
C) No, a user cannot plot several metrics on a single graph since the units are different.
D) Yes, a user can graph multiple metrics on the same graph provided they are of the same instance in the same AZ.