How will a green mixture appear if it contains more yellow?

Correct answer: Yellow-green

The governing concept is hue shifting caused by changing the proportion of a component colour. Green is influenced by blue and yellow; if more yellow is added, the mixture moves toward yellow on the colour wheel and appears yellow-green. Thus option D is correct. Blue-green would indicate stronger blue influence, while dark blue and red-green do not describe the expected direction of this mixture.