Why was Rome easier to unite than Greece?

A.
It had more fertile farmland.

B.
It had less mountainous terrain.

C.
It had easier access to the seas.

D.
It had fewer rivers.

B. Rome was easier to unite than Greece because it had less mountainous terrain. The mountainous terrain in Greece made it difficult for the various city-states to communicate and effectively unite, whereas Rome's relatively flat terrain made it easier for the city-states to come together under a centralized government.