Answer :
The support of popular and well-respected men was an advantage for the Federalists in the battle for ratification
The answer is:
A. a clearly defined program to meet the difficulties of the country
C. the ability to outmaneuver their opponents
Federalist at that time able to point out several weaknesses that created in the initial draft of the constitution, (such as not enough government power to collect taxes).
The federalist won the battle for ratification because they manage to provide solution for such weaknesses while their opponents did not able to provide intelligent comebacks to response to the federalists' points.