A. freshwater fishing.
my reasoning:
Inside the Middle East, most countries have large supplies of oil, (which helps make the countries rich as they are today because of oil demands), which takes out the options C & D. The Middle East, is located within the Sahara desert, and so can contribute to desert research (B) as well.
So A, is your most logical choice.
hope this helps
MAD is an acronym for Mutually Assured Destruction which is a phrase from the Cold War for a stand off between two countries with nuclear weaponry. The concept was, if one country threatened to blow up another, there would be retaliation.
I think the phrase fine texture describes an extrusive rock
