Answer:
all of these
Explanation:
The factors that contributed to the decline and near disintegration of the Native American includes;
1. Disease outbreaks with the coming of the Europeans which decimated their population.
2. Military technology. The superior military power of the Europeans led to the death of several Native Americans during the period of war with the Europeans.
3. Forced relocation. the forced relocation of the Native Americans under rigorous circumstances led to the death of several of them, an example is the trail of death scenario.
4. Forced assimilation.