The answer would be: A) Desert.
Explanation:
A) Desert: Locations in the middle-east are very hot, and don't get much rain. Saudi Arabia, Iraq, and Iran are covered in sand. Which that being said, I can conclude that Saudi Arabia, Iraq, and Iran have a Desert climate.
B) Tropical: Saudi Arabia, Iraq, and Iran are covered in sand, which I can conclude that B) Tropical is the incorrect answer.
C) Mediterranean: I can quickly conclude that mediterranean isn't the correct answer, some of the few area's that are mediterranean: Italy, Egypt, etc. Which, Saudi Arabia, Iraq, and Iran are not mediterranean.
D) Continental is not he correct answer, due to the fact Saudi Arabia, Iraq, and Iran aren't continental.
That being said, A) Desert is th correct answer.