it most likely is the first one cause distribution is when the film is sold, development is basically like the process and how it's going, production is during the creation of the film so pre-production is my best guess
I think is man i hope im right :)
D is the correct answer.
In the badly drawn diagram attached, you will find the <em>yellow</em> represents wavelength, which is the distance between identical points on consecutive waves.
The <em>green</em> represents the amplitude, which is the distance between the origin (middle) and crest/trough (top/bottom)