Points C and D are correct statements for Natural Selection.
Natural selection is the process by which organisms develop variation in traits, which gives them the better chance of survival and Natural selection is the process by which organisms with more beneficial traits are more likely to survive and reproduce.
Step-by-step explanation:
Darwin postulated in his theory that over a period of time there are changes in physical or behavioral traits which are transferred from parent to the next generation. The changes which led to the better adaptation to the environment will help survive the organisms. Such organisms will reproduce.