Which statement correctly explains the relation between a primary colour and colour value?

Correct answer: Adding white or black can change its value

The governing concept is colour value, which means how light or dark a colour appears. Adding white raises the value and creates a tint, while adding black lowers the value and creates a shade. The hue may still remain recognisably a primary colour, so option A is correct. A value change does not turn the colour into a secondary colour, and primary colours also possess value before any mixing occurs.