R, because it is last in the word and furthest in the alphabet.
Well, some people collect rocks, so you could write:
I have collected rocks from San Francisco, Washington, D.C., and Boston.
Answer:
C
Explanation: My dad likes to vacation in the mountains; my mother prefers the beach
A February, 2002 report from the National Academies of Science concluded that while reproductive cloning is unsafe and should be banned, therapeutic cloning has sufficient scientific potential that it should be allowed to continue.
C is the answer. Being visible means that it can be seen.