Answer:
The correct answer is letter "A": present value.
Explanation:
The Present Value of Money concept states that it is better to have a dollar today than a dollar tomorrow. This happens because having money today implies it can be deposited in a bank account to benefit from the interest rate or invest it so at a certain point in time the same amount of money will have a higher value.
Having the money available tomorrow may not provide the same returns as if the started to be invested yesterday.