If orange is used in a greater amount than red in a red-orange mixture, in which direction will the result shift?

Correct answer: Toward orange

The governing concept is colour proportion: a mixed or tertiary colour shifts toward the component used in the greater amount. In red-orange, increasing orange makes orange the stronger visual influence, so the mixture moves closer to pure orange while retaining some red warmth. Yellow-orange would require a stronger yellow influence, and red-violet or blue-green belong to different colour regions. Therefore, option B is correct.