Which Statement About the "Survival of the Fittest" Principle and Conception

Which statement about the "survival of the fittest" principle and conception is true?

A) This principle applies only to the process of egg release from the fallopian tube, not to the other processes involved in conception.
B) The eggs that manage to reach the sperm are likely to be healthy, as eggs with serious defects tend to be unable to reach the sperm.
C) The sperm that manage to reach the egg are likely to be healthy, as sperm with serious defects tend to be unable to reach the egg.
D) This principle does not come into play until a child is born.