What should be corrected if one colour completely dominates the other in a double-loaded brush?

Correct answer: Balance the amount of colour on both edges

Double loading works because two colours remain on separate sides of the brush and appear together in the stroke. If one colour dominates, the loading is uneven, so the correct correction is to place approximately equal amounts on both edges; option B is correct. More mixing destroys separation, while dryness or extra pressure does not fix the unequal supply.