What is meant by the "internal" and "external" frontiers of the Sultanate?
1
The internal frontier refers to the core areas of the Sultanate, while the external frontier refers to the outlying territories.
2
The internal frontier refers to the Sultanate's political boundaries, while the external frontier refers to its cultural influence.
3
The internal frontier refers to the Sultanate's economic zones, while the external frontier refers to its military zones.
4
The internal frontier refers to the Sultanate's urban areas, while the external frontier refers to its rural areas.
5
Question Not Attempted