Correct associations:
1. Thomas Hobbes: Described the state of nature as "nasty, brutish, and short" (A).
2. J.J. Rousseau: Argued "Man is born free, but everywhere he is in chains" (C).
Incorrect associations:
- B: Economics as the base structure is a Marxist idea, not Locke's.
- D: Marx did not describe the state of nature as total freedom and equality.
Thus, the correct answers are (A, C).