Which fact most clearly shows the difficulty in defending the Roman empire against invasion? (1 point) Responses At its height, the empire likely had a population as high as 100 million. At its height, the empire likely had a population as high as 100 million. At its height, the empire comprised nearly 1.7 million square miles of land and water. At its height, the empire comprised nearly 1.7 million square miles of land and water. Over the course of its history, the Roman empire built about 55,000 miles of paved roads. Over the course of its history, the Roman empire built about 55,000 miles of paved roads. The Mediterranean Sea stretches about 2,300 miles west to east and about 600 miles from Italy to the African coast.
The fact that most clearly shows the difficulty in defending the Roman empire against invasion is: At its height, the empire comprised nearly 1.7 million square miles of land and water.
