Step 1: Understanding the Concept:
This is an English vocabulary and grammar sentence correction problem, focusing on using the correct adjective form to describe a person's refined intellect and manners.
Step 2: Detailed Explanation:
- The word "cultural" is an adjective used to describe things relating to culture (e.g., "cultural heritage", "cultural events").
- However, when describing a person who has refined tastes, good education, and manners, the correct adjective is "cultured".
- "Cultured" means refined, educated, and enlightened.
- Therefore, the sentence should read: "Liberal education makes a man cultured."
- Using "a cultural" or "the cultured" is grammatically incorrect in this context.
Step 3: Final Answer:
The correct option is (B) Cultured.