; or (B) in the absence of a complaint. (4) Retaliation prohibited It is a violation of this subsection for any person to intimidate, threaten, restrain, coerce, blacklist, discharge, or in any other manner discriminate against, or to cause any person to intimidate, threaten, restrain, coerce, blacklist, or in any manner discriminate against, an employee, including a former employee or an applicant for employment, because the employee— (A) has disclosed information to the employer, or to any other person, that the employee reasonably believes evidences a violation under this section, or any rule or regulation relating to this section; (B) has filed a complaint concerning the employer’s compliance with the requirements under this section or any rule or regulation pertaining to this section; (C) cooperates or seeks to cooperate in an investigation or other proceeding concerning the employer’s compliance with the requirements under this section or any rule or regulation pertaining to this section