If a brown mixture is too red and its value is correct, which correction is most controlled?

Correct answer: A very small amount of green

The governing concept is a small complementary correction. Green opposes red on the colour wheel, so adding it in tiny increments can neutralise the unwanted red bias while preserving the mixture’s value more closely than adding white or black. White would lighten it, black would darken it, and more red worsens the error. Because the value is already correct, option B is the controlled choice.