Final answer:
The correct answer to neutralize a brassy gold effect after prelightening a client's hair is option D) Violet toner.
Step-by-step explanation:
The correct answer to neutralize a brassy gold effect after prelightening a client's hair is option D) Violet toner.
Brassy tones often occur after prelightening hair, especially on dark hair that has been bleached. Brassy tones have a warm, orange-yellow hue. Violet toner is used to counteract these warm tones because violet is the opposite of yellow on the color wheel.
The violet pigment in the toner helps to cancel out the brassy tones and achieve a more neutral, cooler shade.