In computing a project's cost of capital the risk to use is _________. 在计算项目的资本成本时,使用风险为_________。
A、the risk of the financing instruments used to fund the project (项目融资工具的风险)
B、the risk of the project's cash flows (项目现金流量的风险)
C、a risk-free rate (无风险利率)
D、a historical risk rate using T-bills (使用国库券的历史风险率)