While researching a topic, a student has taken the following notes:

* The Sasanian Empire lasted about 400 years (AD 224 to AD 651).
* The Sasanians controlled an area spanning 1.4 million square miles.
* This area included present-day Iran and Iraq.
* The empire's capital was the ancient city of Ctesiphon.
* Ctesiphon was located near present-day Baghdad, Iraq.

The student wants to specify the location of Ctesiphon. Which choice most effectively uses relevant information from the notes to accomplish this goal?