What best describes a difference between the ancient Greeks and other ancient cultures? The ancient Greeks participated in long-distance trade.
The ancient Greeks did not have fertile land to grow crops.
The ancient Greeks did not build cities around major rivers.
The ancient Greeks built cities in the mountains for protection.

A The ancient Greeks participated in long-distance trade

The ancient Greeks did not build cities around major rivers.

Explanation:

Greece was a peninsula and built around the sea.  Ancient cultures like Egypt were all built around rivers like the Nile River, Euphrates, Tigris, etc.  

It cannot be A because all the cultures participated in long-distance trade.

austria

hugary

yugoslavia

czechoslovakia