Which resource is rich in the caucasus region?

Alumber
Bsilver
Ccopper
Doil?

Verified Answer :

The caucasus region is rich in oil. Oil was discovered in
the Caucasus region as early as the 13th century. Technological advancement
made it possible to access these rich oil reserves. Through trade of oil, the
Caucasus region rose to prominence and exerted its dominance over most of Asia. 

Answer:

D

Explanation:

D. Oil on edge