What was the Compromise of 1850? A- (several laws in the United States by which an applicant could acquire ownership of government land or the public domain) B- (an act that required slaves be returned to their owners, even if they were in a free state) C -(five separate bills passed by the United States Congress that defused a political confrontation between slave and free states on the status of territories gained in the Mexican-American War) D- (law passed admitting Missouri as a slave state and Maine as a free state)​