The city located at "A" has been known by what na in history? Check all that apply. Rome Byzantium Constantinople Istanbul Baghdad

The question is asking about the historical names of a city located at "A". The city referred to here is Istanbul, which has been known by several names throughout history. The city was originally known as Byzantium, then it was renamed Constantinople after the Roman Emperor Constantine the Great, and finally, it was renamed Istanbul after the Ottoman Empire took control. Therefore, the correct answers are Byzantium, Constantinople, and Istanbul. Rome and Baghdad are not correct as they are different cities.