The national unity of a free people P : to make it impracticable Q : for there to be an arbitrary administration R : depends upon a sufficiently even balance of political power S : against a revolutionary opposition that is irreconcilably opposed to it The Proper sequence should be:

Answer: Option D

The national unity of a free people depends upon a sufficiently even balance of political power against a revolutionary opposition that is irreconcilably opposed to it to make it impracticable for there to be an arbitrary administration.