I'd say to help the reader quickly locate geographic regions.
The answer is C.
A is not specific
B has nothing to do with humans
C is specific enough and would be pretty handy
D makes no sense
Hope this helps!
A)
learn about the universe and the laws of nature.
B)
design new scientific instruments.
C)
make new inventions and processes to benefit humans.
D)
make new scientific discoveries.
I believe the correct answer is C, but I'm 100% on this. Hope this helped though!