Final answer:
The true statement about Native Americans is that they all have had their land compromised in some way. They did not generally share a language and experienced both internal conflict and severe impacts from diseases such as smallpox due to no immunity to European pathogens.
Step-by-step explanation:
Of the provided statements about Native Americans, the one that is true is that they all have had land compromised in some way. Throughout history, Native Americans faced repeated dispossession, displacement, and treaties that often resulted in loss of lands and resources. Reservations were established as lands set aside for Native tribes, but these too were often inadequate and led to dependency on government assistance. Moreover, Native Americans did not traditionally share a similar language across different tribes, and there was significant internal conflict and warfare among various groups.
Diseases like smallpox significantly afflicted Native Americans because they had no immunity to European diseases. Unlike Europeans who had been exposed to these diseases for centuries, Native people encountered them for the first time following European contact and suffered devastating losses. Reservation life, while harmful to many tribes, affected a variety of Native American groups differently in terms of resources and survivability. The idea of little war among native groups is inaccurate; intertribal conflicts were not uncommon, especially as displacement and resource scarcity increased tensions.