(1) The term “protest” means a written objection by an interested party to any of the following: (A) A solicitation or other request by a Federal agency for offers for a contract for the procurement of property or services. (B) The cancellation of such a solicitation or other request. (C) An award or proposed award of such a contract. (D) A termination or cancellation of an award of such a contract, if the written objection contains an allegation that the termination or cancellation is based in whole or in part on improprieties concerning the award of the contract. (E) Conversion of a function that is being performed by Federal employees to private sector performance.