Answer:
One Idea was the appreciation that the age of the Earth was much greater than had hitherto for been imagined.
I believe the answer is B because the egg becomes fertilized by the sperm inside the body.
(Sorry if this is late)
The answer to this is B because it is the only answer choice that is true.
This is actually a quick process, making A incorrect.
C is incorrect because there are no different genes to combine with, since there is only ONE parent cell.
D is incorrect because the offspring are clones. They haven't adapted at all.
Have an awesome day! :)
the answer to ur problem above is (b)