Insurgent political parties that are profoundly dissatisfied

Insurgent political parties that are profoundly
dissatisfied with the dominant party’s reign and
justificatory ideology always produce factions whose
views and aims differ as greatly from each other’s as
they do from the dominant party’s. Although these
factions ignore their own disagreements for the sake of
defeating the dominant party, their disagreements
inevitably come forward upon victory.
Therefore, _______.
Which one of the following is the most logical
completion of the argument?
(A) no victorious insurgent party ever manages to
stay in power for as long as the party it
displaces did
(B) a victorious insurgent party must address the
disagreements between its factions if it is to
stay in power
(C) the heretofore insurgent party will not always
promulgate a new ideology to justify its own
policies, once it is victorious
(D) a victorious insurgent party always faces
opposition from the party it recently ousted
(E) it is impossible for the different factions of a
victorious insurgent party to effect the
compromises necessary to keep the new party
in power