In what way was transportation in the 19th century linked to the concept of manifest destiny?

Transportation in the 19th century linked to Manifest Destiny by making it easier to get from one place to another faster and spread out. 

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

party organizers: individuals responsible for designing strategies in order to better execute the political campaign. this includes the candidate's public relations. volunteers: individuals responsible for raising awareness regarding the candidates running for office.voters: individuals who are convinced by volunteers that a particular candidate is the best option.elected officials: winning candidate and his elected team are a product of a successful political campaign.

Its a whole new world