A functional region is a region is a central place and the surrounding area linked to it.
Cuba is the largest by size and population and Hispaniola is the second.
In Syria and Jordan, most of the rainfall is on the West of the two countries, closest to the Mediterranean Sea. (so not in the East)
there is also a considerable amount of rain at the Golan Highlights, which are just West of the Jordan River, so in total the best answer is
d. on the highlands and the Mediterranean coast.
In Russia, after the global financial crisis in 1998, Russia became a major exporter of grain after 2001.