Which of the following statements about gene therapy is not true? A. Functioning genes are used to replace mutated genes.
B. Gene therapy can cure any disease.
C. Somatic gene therapy only works on individuals.
D. Gene therapy is another form of artificial selection.

The answer would be c

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