A small mistake became larger during final correction in watercolour. What is the most likely cause?

Correct answer: Repeatedly disturbing the area with a wet brush

Watercolour corrections are governed by the paper’s absorbency and the fragility of a worked wash. Repeatedly rubbing or disturbing the same area with a wet brush can lift pigment, spread the mark, and weaken the paper surface, making a small error larger. A limited correction on dry paper, a test sample, and a fine brush generally improve control when used appropriately. Thus option B identifies the likely cause of the damage.