The answer is B. They promised to improve the economy.
Although Belisarius seems never to have been disloyal, Justinian was always fearful that so popular a commander might attempt to seize the throne, and he was always receptive to slanders circulated by the general's enemies.
Answer: The causes of Bantu migratiin are:
-Farming techniques
-Developing agriculture
-Area were becoming desert like
-Using more land for farming which caused less living space for people
The effect of Bangu migration are:
-Defending their life and land
-Territorial wars began
-Resource depletion
-Brought new cultures and different ideas
-Populated the world with different blends of people
Both events were a time of reviving and an awakening for America. Hope that helps you out. Please mark as brainliest if this has helped. Thank you.