The correct answer is (C) A general truth based on experience; a succinct general truth or principle drawn from science or experience; a principle or rule of conduct; a moral reflection.

Maxim comes from French maxime, Latin maxima (greatest)

Examples of use:

• He would recite maxims from his earlier days to all who would listen.
• "A man's house is his castle" is an example of a well-known maxim.