What is the best evidence of a correct understanding of primary colours?

Correct answer: Identifying them and making secondary colours with correct pairs

A real understanding includes both recognition and application. A learner should identify the primary colours and use correct pairs to make secondary colours: red plus yellow gives orange, yellow plus blue gives green, and blue plus red gives violet. Therefore option B is the strongest evidence. Memorising names alone is limited, and darkening or using equal amounts does not demonstrate colour relationships.