The “compton effect” showed a. that light undergoes interference b. how an experiment can mislead c. the wave nature of light d. the particle nature of light

Answer;
D. the particle nature of light
The "Compton effect" showed the particle nature of light.

Explanation;
Light is both a particle and a wave phenomenon.
Light shows photoelectric effect and Compton effect, which depicts its particle nature. 
It also shows interference and diffraction, which depicts the wave nature of light. 

Biased means unfair but that's all ik