What problem may occur when filling a large area with too little paint on the brush?

Correct answer: Strokes may look broken and uneven

Good colour filling requires enough paint on the brush to maintain a continuous layer across the surface. If the brush carries too little paint, its stroke may run out before the next stroke joins it, leaving gaps, streaks, or uneven coverage; therefore option C is correct. Too little paint does not automatically make the colour darker, create shine, or draw a boundary. Proper brush loading supports smooth, consistent application.