The correct answer is D) campaign platform/ presidential agenda.
A presidential candidate promotes a campaign platform during the campaign, the goals of which generally transfer the goals into the presidential agenda,
During the political campaign, the candidate makes promises to his followers and have a campaign platform where people can know about his objectives in different areas such as politics, economy, trade, security, infrastructure, security, and many more. If the candidate wins the election, those promises that were part of the campaign platform became now an important aspect of his presidential agenda because he needs to have a plan in order to fulfill all the promises he made during the campaign.