An analyst does research about beta and gathers the following information about a capital investment project with 30% debt financing and 70% equity financing.
The marginal tax rate is 35%. If the unlevered beta of a comparable company is 1.50, the levered beta for the project is closest to:（）

A. 1.08

B. 1.92

C. 3.78

进入沼气池检修应注意哪些安全问题？