Answer:
A (I only) The rescue of the foundations of popular sovereignty
Step-by-step explanation:
The liberal ideals that marked new republics focused on the rights people have in republics, which governments should protect in the best way they could. This is clearly shown in the U.S. Declaration of Independence and the French Declaration of the Rights of Man and of the Citizen. In some way these ideals come from the Enlightenment that questioned the Divine right of monarchs and claimed that the government´s purpose is to protect and to serve the people (=popular sovereignty), as in A.
II The separation of the powers of the state is a doctrine of (specific) American law that separates the executive, legislative and judicial power.
III A marked society of privileges is what the liberal ideals were trying to get rid of.