How much paint should be on the brush to make a clean dot with poster colour?

Correct answer: A controlled, appropriate amount of paint

The governing concept is control of paint quantity. A clean dot requires enough poster colour to transfer a definite mark, but not so much that it drips, spreads, or loses its shape. Therefore, option C is correct. A large dripping load can make an irregular blot, while no paint or only water cannot create a coloured dot. The artist should remove excess paint from the brush tip and test the consistency before making the mark.