The type of evidence that Schlosser uses in this excerpt is anecdotal. By definition, anecdotal evidence is based on stories that may or may not be true but due to lack of hard facts. They are usually based on personal stories. In this case, there is no proof that things mentioned in the excerpt happened the way that they were described.
I'd say A. Since Color Values go along with RGB
Okay, I’m going to help you a little here. The answer is D. “Proportions don’t matter when it comes to the first design of a sketch.” If you think about it, it won’t ever be proportional. Just like a first draft of a paper, it will never be perfect for the first try. When sketching, proportions are for the later steps, and not to focus on when your sketching out your first image.
For your bonus question, “Sketches differ with different clothing and designers.” Is definitely true. The sketches and designs will differ for each person, and will never be an exact replica.