Which of the Following Statements Is Incorrect

Which of the following statements is incorrect?

A) In general, money today is worth more than money in one year.
B) We define the risk-free interest rate, r_f, for a given period as the interest rate at which money can be borrowed or lent without risk over that period.
C) We refer to (1 - r_f) as the interest rate factor for risk-free cash flows.
D) For most financial decisions, costs and benefits occur at different points in time.