If green made from blue and yellow is muddy, which choice can produce a brighter green?

Correct answer: A green-biased blue and a blue-biased yellow

The governing concept is pigment bias in subtractive colour mixing. To obtain a bright green, choose a blue that leans toward green and a yellow that leans toward green or away from orange; the supplied option describes pigments with minimal opposing red influence. Therefore, option A is correct. Red-biased blue and orange-biased yellow contain warmer opposing tendencies that neutralise the mixture and make it muddy. Black lowers value, while blue and violet do not provide the balanced yellow-blue pair needed for a bright green.