Let me think for a sec. don't worry I know the answer.
C use the same value throughout the entire artwork
If your trying to emphasize something you don’t want it all the same
2D design is flat design, like drawing or sketching.
http://resources.hwb.wales.gov.uk/VTC/ngfl/dandt/75/Tutorials/2D%20Design/Section1.pdf
use this pdf to learn how to use it
I don’t know what you’re saying
