If red and orange pigments have equal visual strength which proportion is more suitable for making red-orange?

Correct answer: More red than orange

The governing concept is dominance within a tertiary mixture. Since the pigments have equal visual strength, the colour used in the first part of the name should be present in the greater amount. Thus, using more red than orange produces a mixture that leans toward red while retaining an orange influence, so option A is correct. More orange would reverse the bias, and blue or black would alter the hue or value rather than create the intended red-orange balance.