Why was Rome a good site for a city? Choose all answers that are correct.

A. Rome had an ideal seaport.

B. Rome was built on seven hills, which offered natural protection from invaders.

C. Rome was located on a large river.

D. The climate of Rome was good for growing a variety of crops.

Which of the following is an example of a concurrent power? a. when a group of states work together to regulate interstate commerceb. when a federal law enforcement agency state policec. when a state creates a treaty with a foreign governmentd. when a local government collects taxes on imports