Explanation:

- The sentence describes a person as "crude."

- Crude generally means someone who is rough, unrefined, or lacking in sophistication.

Now, let's look at each option:

- Option 1: Coarse - This means rough or lacking refinement, which is similar to "crude," not opposite.

- Option 2: Refined - This means sophisticated, polished, or cultured, which is the opposite of "crude."

- Option 3: Eager - This means enthusiastic or keen, which is unrelated in meaning to "crude."

- Option 4: Balanced - This means stable or even-tempered, which doesn't relate directly to "crude."

Your understanding is correct. Refining the character from "crude" involves making it more sophisticated and polished, so: