Semi-arid climates in this region are found primarily A.
along the coasts
B.
in the interior of the Arabian peninsula
C.
in the interior of the Iranian and Anatolian plateaus
D.
in the mountain areas

It would not be A because of too much rain, nor b because the peninusla is a giant desert. And the mountain areas would be too vauge of an answer. So it would have to be The Iranian and Anatolian plateaus where there isn't really that much rainfall, but at the same time isn't a desert. Hense being Semi-arid.

Explanation:

they wanted the u.s. to fight on the side of the central powers.