please highlight which answer is correct thanks

Which of the following statements is MOST correct? The IRR calculation implicitly assumes that all cash flows are reinvested at a rate of return equal to the IRR. If Project A has a higher IRR than Project B, then Project A must also have a higher NPV. If a project's internal rate of return (IRR) exceeds the required return, then the project's net present value (NPV) must be negative. A project with a NPV =0 is not acceptable