Answer:
A. agenda
Explanation:
Agenda is the set of goals that the president will at most bring up and try to follow (as it may be struck down either by the Supreme Court or Congress.
It is not platform, for platform is the beliefs supported by a political party, not necessarily a politician by himself.
Eligibility states that the person is "eligible" to become a president, i.e., they met all the requirements.
Ticket is who is running for president, his/her running mate, and anybody else trying to take a place in the office.
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