American exceptionalism can best be defined as the belief that a. the united states could acquire territory by force because us troops were exceptional. b. the united states had a duty to spread its ideals around the world. c. oregon country should be different from other northwestern territories. d. oregon country was an exception to british possessions in the west.

to protect the united states' role as a world leader, president truman wanted to prevent the soviet union from spreading communism beyond its post-world war ii boundaries. he declared that the united states must assist any nations struggling to prevent a communist takeover.

i do believe its (d) it allowed the government to offer pioneers sixty acres of western land if they lived on it and made improvements to it.

explanation: signed into law in may 1862, the homestead act opened up settlement in the western united states, allowing any american, including freed slaves, to put in a claim for up to 160 free acres of federal land. by the end of the civil war, 15,000 homestead claims had been established, and more followed in the postwar years