I think it’s the second one
Sorry if it’s wrong
<span>The correct answers are B. A moat filled with water from the Euphrates River surrounded the city, and
C. Walls around the city provided protection from enemies. This was copied later by many cities beacuse it was successful. Cities would dig deep trenches and holes around the city and fill them with water and you wouldn't be able to enter without crossing the bridge that may or may not be lowered for you. </span>
His name was Albert Einstein that’s the answer
