the functional state of rna polymerase ii is altered by phosphorylation on which region of the protein?

The answer is reflection.

C- a hypothesis or d- an observation

Are you asking about a street map usage  if so here is your answer  a street map for a very limited area could simply be a bit map or a .jpg image.  but a more general map would probably store the streets as vectors.  but you shouldn't assume that there is one way to do it