Although dred scott lost his case before the supreme court, a subsequent master freed himand his wife, harriet.

the answer wold be b) travel among nations should be regulated by an international organization

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.  

the correct answer is a: slaves from other colonies ran away to georgia.