grants awarded by the Director of the National Science Foundation, shall conduct audits of recipients of grants under this subtitle or any amendments made by this subtitle to prevent waste, fraud, and abuse of funds by grantees. Such Inspectors General shall determine the appropriate number of grantees to be audited each year. (B) Mandatory exclusion A recipient of grant funds under this subtitle that is found to have an unresolved audit finding shall not be eligible to receive grant funds under this subtitle or any amendment made by this subtitle during the first 2 fiscal years beginning after the end of the 1-year period described in subsection (A). (C) Priority In awarding a grant under this subtitle or any amendment made by this subtitle, the awarding entity shall give priority to eligible applicants that did not have an unresolved audit finding during the 3 fiscal years immediately preceding the date on which the entity submitted the application for such grant. (D) Reimbursement If an entity is awarded grant funds under this subtitle or any amendment made by this subtitle during the 2-year period when the entity is barred from receiving grants under subparagraph (B), the awarding entity shall— (i) deposit an amount equal to the amount of the grant funds that were improperly awarded to such entity into the general fund of the Treasury