Geography help me please

Their citizens are primarily of Arab heritage.

Explanation:

The countries highlighted in Dark grey on the map are located on two continents, Asia and Africa. This rules out option B. The countries on this map also have ports on different bodies of water, even different oceans. And no one country borders all the countries in dark grey so D can also be ruled out. What these countries share is a majority Arab population and heritage. The Arabs are native peoples of Arabia, and moved into northern Africa during various Islamic conquests. They are now the dominant ethnic and cultural group in much of Northern Africa and Arabia, which are the regions shaded in Dark grey.