What is the benefit of a split-primary palette when studying secondary colours?

Correct answer: It helps produce cleaner orange, green and violet

A split-primary palette provides warm and cool versions of the three traditional primaries. The artist can select primaries whose biases point toward the desired secondary colour: warm red plus warm yellow for orange, cool yellow plus greenish blue for green, and cool red plus reddish blue for violet. This minimises unwanted complementary contamination, so option A is correct; the other choices contradict the purpose of the palette.