The belief that the united states had a special mission to expand over the entire north american continent was known as?

The Manifest Destiny

Explanation:

The doctrine of Manifest Destiny was a common belief among the inhabitants of the United States which said that American colonists should expand across North America. It expresses the belief that the American people were elected by God to civilize their continent, to rule the world, with American geopolitical expansionism merely an expression of this divine will.

the answer is d. party organizers, volunteers, voters and elected officials.