Describe uses for public land other than for state and federal parks.

Public lands are areas of land set aside by the federal or state government for different types of purposes. The government regulates and protects these lands from illegal use. Public land can be used for grazing, tress cultivation, extraction of minerals, preservation of wildlife, preservation of fish population, preservation of watersheds, maintenance of historical sites, etc. 

Ithink option a is correct because you cannot donate a different blood group than yours because it won't match.option a says betsy can donate to mark. they have the same blood group so donation can happen.