What is the main effect of adding a small amount of red to green?

Correct answer: Green will lose saturation

The governing concept is complementary colour neutralisation. Red and green lie opposite each other on the traditional colour wheel, so adding a small amount of red reduces the purity and saturation of green, usually making it duller or more olive-like. Option B is correct. A complementary addition does not brighten the colour, nor does it transform green directly into pure yellow or blue; a larger amount may push the mixture toward brown or neutral tones.