Question

candace is interested in learning more about colors. which question about colors could be answered through scientific investigation?
which color bends the most to make a rainbow?
what color of scented marker has the best smell?
two partially visible options omitted

Explanation:

A scientific investigation question must be testable and objective. "Which color bends the most to make a rainbow?" can be tested using physics (optics) principles, as the bending of light (dispersion) for different colors is a measurable, objective phenomenon. The other questions involve subjective opinions (best smell, greatest appeal, most pleasing) which can't be scientifically investigated.

Answer:

A. Which color bends the most to make a rainbow?