What should be corrected if a dry-brush stroke looks too harsh and rough?

Correct answer: Reduce pressure and use slightly more paint or moisture

Dry-brush texture requires limited moisture, but an extremely dry brush used with heavy pressure can create harsh, scratchy marks. Reducing pressure and adding a small amount of paint or moisture makes the stroke smoother while preserving some broken texture. Completely soaking the brush would turn the process into a wetter technique and remove the intended dry-brush character. More pressure and scratching worsen the surface. Therefore, option D is the controlled correction.