What correction is appropriate if excess paint creates a thick blot at the start of a line?

Correct answer: Remove excess paint on the palette edge

The governing concept is controlling the paint load before making a stroke. When too much paint gathers at the brush tip, lightly remove the excess along the palette edge, then begin the line with controlled pressure. Taking more paint worsens the blot, pressing harder spreads it, and leaving the brush in water is not a painting correction. Thus option D gives the cleanest and most controlled start.