Interest rate r = 8% per year. Here are two investment options: Year 1 Year 2 Year 3 Option A, period cash flow ($) |-10,000 15,000 10,000 Option B, period cash flow ($) |-10,000 10,000 5,000 Which one of the following statements is true? O A. Option A is better B. Option B is better O C. Option A and B are equally good O D. None of the above is correct