What strategy native americans keep more of their land? a. being more welcoming to the settlers b. willingness to negotiate with the settlers c. tribes one another fight the europeans d. willingness to work the land for the europeans

The answer is #4, but depending on where they lived and which Europeans had conquered them.
Protestant English, Dutch, Swedes viewed Natives as subhuman and therefore on fit for extermination no matter what the Natives did or acted.
The Catholic Spanish viewed Natives as humans with certain rights, and a source of cheap labor. Therefore in order to use the Natives to their advantage, the Natives had to be alive and live somewhere.