Hanson Aluminum, Inc. is considering whether to build a mill based around a new roiling technology the company has been developing. Management views this project as being riskier than the average project the company undertakes. Based on their analysis of the projected cash flows, management determines that the project’s internal rate of return is equal to the company’s marginal cost of capital If the project goes forward, the company will finance it with newly issued debt. Should management accept or reject this project（）

A. Accept, because the project returns the company’s cost of capital.

B. Accept, because the marginal cost of the new debt is less than the project’s internal rate of return.

C. Reject, because the project reduces the value of the company when its risk is taken into account.

正常人甲和乙分别生活在平原和高原，则他们每升血液中的红细胞数量情况为

A．甲＝乙

B．甲＜乙

C．甲＞乙

D．无法确定