TOPIC: AOA/PDM

Hi I am confused by the answer to this question in the newsletter:
You are creating at a Project Schedule Network Diagram on which you can only use finish-to-start relationships. In which style are you drawing this network diagram?

A.) Arrow Diagramming Method
B.) Precedence Diagramming Method
C.) Arrow Dispersal Method
D.) AON

The suggested answer: A.) is correct. The Arrow Diagramming Method* (also known as activity-on-arrow) is the only one of the diagramming methods that allows only the use of the finish-to-start dependencies.

PMBOK states that a PDM can be used for Finish to Start - page 157.

Would appreciate clarification.

Question states that "you can only use finish-to-start relationships"
PDM uses all four logical relationships but Activity on Arrow use only Finish to Start relationship.