Select the TWO reasons that describe why trade is essential in Saudi Arabia?

A. Because Saudi Arabia is surrounded by ocean on all sides.
B. Because Saudi Arabia specialized in oil refinery but does not grow enough of its own food.
C. Because Saudi Arabia is centrally located in the region.
D. Because Saudi Arabia is mostly desert.

B. Because Saudi Arabia specialized in oil refinery but does not grow enough of its own food.

C. Because Saudi Arabia is centrally located in the region.