; (B) the average annual price of zero-emission electricity credits is equal to or greater than the alternative compliance payment under subsection (c) for such calendar year; (C) the Secretary determines the number of megawatt-hours of zero-emission electricity that could have been generated or purchased by the petitioner using technology that was available during such calendar year— (i) at or below the cost per megawatt-hour of the technology used to generate the electricity sold by the petitioner in the previous calendar year; and (ii) while enabling the petitioner to operate its system at an adequate level of reliability; and (D) the number of megawatt-hours determined under subparagraph (C) is less than the number of zero-emission electricity credits the petitioner would be required to submit under subsection (a). (3) Credit submission Notwithstanding subsection (a)(1), if the Secretary makes a determination of inadequate availability of technology for a petitioner for a calendar year, as described under this subsection, the petitioner shall not be required to submit for such calendar year more than the number of zero-emission electricity credits equal to the number of megawatt-hours determined under paragraph (2)(C). (4) Carbon mitigation awards For the calendar year identified under paragraph (3), if the Secretary makes one or more determinations of inadequate availability of technology under this subsection, the Secretary shall award under section 205(b) an amount of money equal to the sum of— (A) the total amount paid by retail electricity suppliers as alternative compliance payments