The reinvestment approach to the modified internal rate of return:

discounts all negative cash flows to the present and compounds all positive cash flows to the end of the project.

discounts all negative cash flows back to the present and combines them with the initial cost.

reinvests all the cash flows, including the initial cash flow, to the end of the project.

compounds all of the cash flows, except for the initial cash flow, to the end of the project.

individually discounts each separate cash flow back to the present.