What is the best way to keep the amount of colour even over a large area?

Correct answer: Reload the brush with a similar amount of colour after a few strokes

The governing concept is consistent brush loading. Over a large area, the painter should reload the brush at suitable intervals with a similar paint-to-water ratio and continue with overlapping strokes. Option A is correct because it maintains a more even tone and coverage. Never reloading causes the colour to fade, changing colours breaks unity, and keeping the brush in water makes the mixture too diluted.