Draw them where ur eyes are on ur face draw eyes on a portrait is the same as looking in the mirror
Color grading is the process used to change the visual tone of an image, many photographer's use this. Hope it helps!
A. Understand the concept behind each element and principle of design in the artwork. Because, The It's just a Visual Analysis so my highest guess would got to A since it's the only one that makes Sense when it comes to Visual.
Hope this helps!!