The excerpt from Colonel William Eyre is best understood as a response to (Choice C) the acquisition of new territory from France following the Seven Years' War.
In the context of the time, after the French and Indian War (part of the global Seven Years’ War), Britain gained significant territory in North America. Eyre's comments regarding the need to maintain good relations with indigenous nations and to acquire land through cession or purchase reflect the colonial strategy in managing relationships with Native American tribes and the newly acquired lands. His concern about preventing any jealousy from indigenous nations indicates an awareness of the complexities of expansion and the necessity to build alliances while also expanding colonial settlements.