Final answer:
Option (C), The Huns rose from separate tribes into a kingdom largely due to strong military leadership and tactics, with their fearsome reputation as warriors playing a pivotal role in their ability to conquer and unite.
Step-by-step explanation:
Factors Contributing to the Huns' Rise
The factors that contributed to the Huns' rise from separate tribes into a kingdom were primarily strong military leadership and tactics. The Huns were known for their expertise as horsemen and their ability to wage effective warfare, enabling them to unite disparate tribes and conquer territories.
This was in stark contrast to peaceful methods; the Huns' prowess in battle was their main tool for expansion and cohesion. While advanced agricultural techniques and economic prosperity played roles in the development of societies, these were not the key drivers for the Huns' rise.
The Huns' military emphasis breathed fear into neighboring regions, including causing Germanic tribes to seek refuge within the Roman Empire. The Huns also made use of alliances and marriages diplomatically to solidify power, but their primary method of expansion remained military might. The creation of their kingdom was a testament to their martial abilities and strong leadership rather than economic factors or peaceful negotiations.