Roman authorities treated conquered people in a very just way. Once the conquered decided to accept their conquerors and started paying taxes and supplying soldiers, the Romans allowed them to maintain their beliefs, their local governments and their customs, giving them partial citenzenship and thus making them able to marry Romans and carry trade.
To feel like they belonged, had protection
D. The reason for the fall of the Maya civilization is still unknown. There are many different theories attempting to explain the cause of the Classic Maya collapse and the abandonment of Maya cities in the southern Maya lowlands of Mesoamerica between the 8th and 9th centuries: climate change, drought, deforestation, etc. but although the drought is the leading theory at the moment the truth is yet unknown.