What type of grants were given for military duty?

The correct choice is based on the historical context of grants associated with military service. Donation and bounty grants were specifically established as rewards for individuals who served in the military. These types of grants were aimed at incentivizing military enlistment and recognizing the contributions and sacrifices made by service members.

Bounty grants were often given as a financial incentive for joining the armed forces, while donation grants were given to acknowledge the service by providing land or other benefits. Together, these grants served to encourage enlistment and provide for veterans after their service, reflecting the government's acknowledgment of their commitment and sacrifices.

Other options may refer to different forms of land or financial exchanges but do not directly tie to military duty in the same sense that donation and bounty grants did. Therefore, the context of military rewards is the key factor that validates this choice as the correct response.