50 POINTS!!!

Read this excerpt form the declaration of independence:

But when a long train of abuses and usurpations, pursuing invariably the same Object envinces a design to reduce [the people] under absolute Despotism, it is their right, it is their duty, to throw off such Government, and to provide new Guards for their future security.
A. Republicanism
B. Sep. of powers
C. Social contract
D. Direct democracy

WILL GIVE BRAINLIEST TO CORRECT ANSWER.