If a project has a net present value equal to zero, then:

a. The IRR is equal to the required rate of return.

b. A decrease in the project's initial cost will cause the project to have a negative NPV.

c. The total of the cash inflows must equal the initial cost of the project.

d. Any delay in receiving the projected cash inflows will cause the project to have a positive NPV.

e. IRR must also equal zero.