Roy Co. has only one product line. For that line, the reorder point is 500 units, the lead time for production is three weeks, and the sales volume is estimated at 48 units per week. Roy has established which of the following amounts as its safety stock? A. 356 B. 644 C. 144 O D. 500 Which of the following statements is true if the NPV of a project is -$4,000 (negative $4,000) and the required rate of return is 5%? O A. The project's IRR is less than 5%. OB. The NPV assumes cash flows are reinvested at the IRR. O C. The NPV would be positive if the IRR was equal to 5%. OD. The required rate of return is lower than the IRR