How did the success of the american revolution contribute to the french revolution?
it led the french to seek an alliance with the americans to dethrone louis xvi.
it inspired the french to launch their own revolution for liberty and equality.
it encouraged the french to adopt the government system of popular sovereignty.
it caused many french nobles and clergy to move to the newly independent united states.
it made the french vulnerable to attacks, invasions, and threats from the united states.

I was in doubt between the first two alternatives, but I would choose the second (B).

In the eighteenth century occurred the dissemination of the Enlightenment ideology, which motivated the struggle of several nations against the action of monarchical regimes, influencing the two revolutions.

However, victory in the United States led to the proclamation of the Declaration of Rights (1776), which has ideological similarities to the Declaration of the Rights of Man and the Citizen (1789). Both defend that the political institutions have origin in the popular power, that is, that the power must emanate of the population. The ruler must represent popular sovereignty in his mandate.

c) legal battles last five weeks after the election due to the narrow victory in several states.

i also think it is c