Final answer:
Oman had a historic advantage due to its strategic location, economic advantage from its oil reserves, and military advantage through its strong naval presence.
Step-by-step explanation:
The historic advantage of Oman was its strategic location, which made it a key player in the trade routes of the past. It was located at a vital choke point where all oil tankers had to pass through. Its economic advantage came from its oil reserves, which allowed Oman to build infrastructure and invest in its development. On the military front, Oman had a strong naval presence, which gave it the ability to protect its trade routes and secure its borders.