If you want to apply an effect to multiple layers and adjust all layers at once, which method should you use?

If you want to apply an effect to multiple layers and adjust all layers at once, which method should you use?

A. Use the layer pick whip to link properties.
B. Parent the layer controls.
C. Use an adjustment layer.
D. Set one layer effect and then copy and paste its results to the other layers.

Correct answers is option C. Use an adjustment layer.