I believe the answer is: Book value
The number in the book value is made after considering two things; the price when we acquire the asset and the amount of depreciation or appreciation.
Selling an asset on book value is the bare minimum needed for the sellers to not experiencing a financial loss
Natural Mating is the natural way to mate or have intercourse.
MORALITY is the closest term related to the crude death rate.
I believe it would be the letter 'C' ;w; Good luck, sorry if this is incorrect.