Final answer:
The claim that the British gave smallpox-infested blankets to the Native Americans is true; this was considered as a tactic during Pontiac's War. Additionally, Native tribes often sided with the British to prevent American expansion, there was an increased sense of colonial unity post-French and Indian War, and the Proclamation of 1763 was a response to Native uprisings.
Step-by-step explanation:
To help quell the Native American uprisings after the French and Indian War, the British gave smallpox-infested blankets to the Indians. This statement is considered true. Historical accounts do suggest that British officials considered or attempted to use smallpox as a biological weapon during the conflicts with Native Americans. For example, during Pontiac's War, there was correspondence that proposed this method to reduce the forces of the resisting Native Americans. It's widely acknowledged that smallpox and other European diseases had a devastating effect on Native American populations post-contact, exacerbating the impacts of the westward expansion.
Turning to the other statements provided for reference:
- Most Indian tribes and nations supported the British during the Revolutionary War due to concerns over American expansion and loss of land, which is generally accepted as true.
- An increasing sense of common identity among the colonists was one of the legacies of the French and Indian War, and this is also seen as true.
- The Proclamation of 1763 was indeed enacted in part as a response to Pontiac's War, another true statement.