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.
This is because the Middle East is typically considered a dry, desert like place (this also makes b an incorrect answer). On top of that, the Middle East is known for oil production and trade. Therefore, through process of elimination and geography, A would be the correct answer.
Sarah avoids public places to avoid the panic attacks she gets when in crowded areas because she has agoraphobia. Agoraphobia is the fear of places that cause you to feel panicked, embarrassed, or helpless.
