The Commission shall review the Postal Service reply and public comment. The Commission shall either:
(a) Approve the proposal to modify the market dominant and competitive product lists, but only to the extent the modification is consistent with the position of the Postal Service;
(b) Withdraw the proposal;
(c) Institute further proceedings to consider the proposal, identifying relevant issues that may require further development; or
(d) Direct other action as the Commission may consider appropriate.