Step 1: Understanding the Concept:
The sentence expresses a general fact or a characteristic trait of a person.
Such sentences are written in the Simple Present Tense.
Step 2: Detailed Explanation:
The subject "A brave man" is singular (third person singular).
For a negative sentence in simple present tense with a singular subject, the structure is: [Subject + does not + V1 (base form)].
(A) "has not lost" is Present Perfect and doesn't fit a general trait.
(B) "do not lose" is used for plural subjects or 'I' and 'You'.
(C) "does not lose" follows the singular subject-verb agreement rule correctly.
Step 3: Final Answer:
The correct option is (C).