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

IRR must also equal zero.

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

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

The present value of all cash inflows must equal the costs of the project. The IRR is equal to the required rate of return.

The IRR is larger than the required rate of return.