Which of these occured after the nationalist agenda was set during the nineteenth century? a) the u. s. more than doubled in size. b) big business grew. c) the transcontinental railroad was builtd) all of the above

The answer to the question above is option D: All of the above. Actually the nationalist agenda that happened during the nineteenth century was considered to be historical and has the most significant impact both politically and economically. Big business grew, and the transcontinental railroad was built. This also led to the United States doubling in size. Hope this helps.