The question asks for the implication of the Kushanas adopting the title 'King of kings'. This title signifies a supreme ruler who holds authority over other subordinate kings.
Meaning of 'King of Kings' Title
The epithet 'King of kings', also known as 'Shahenshah', was adopted by the Kushana rulers. This title clearly indicates a hierarchical structure of power where the Kushana ruler was considered paramount over other regional rulers.
Implication of Supreme Authority
- A ruler adopting such a grand title typically implies dominion over other vassal or client kings.
- This dominion often involved the expectation or demand of tribute, taxes, or allegiance from these subordinate rulers.
- The title signifies not just ruling a large territory, but also exercising overlordship.
Analysis of Options
- Option 1 is too general. While they ruled parts of Bharat Varsha, the title specifically implies rule over *other kings*.
- Option 2 might be related to their administration, but the title 'King of kings' doesn't directly point to strengthening the Satrap system.
- Option 3 refers to a specific historical event (overthrowing Parthians), which is not the direct meaning conveyed by the title itself.
- Option 4 directly aligns with the meaning of being a 'King of kings' – exercising authority over numerous smaller princes who would likely pay tributes.
Therefore, the title 'King of kings' indicates that the Kushanas collected tributes from numerous small princes, signifying their supreme status.