The correct answer is C — Fiduciary Liability. Individuals who exercise discretionary authority or control over employee benefit plans, including private pension or retirement plans, can have fiduciary responsibilities under ERISA. Fiduciary liability insurance is specifically designed to address claims alleging breaches in those responsibilities, including improper plan administration, imprudent investment decisions, failure to follow plan documents, conflicts of interest, or other alleged fiduciary misconduct.

Travelers explains that persons who manage retirement or health plans or control plan assets may be fiduciaries and may face personal liability for breach of fiduciary duty. Chubb similarly identifies employee welfare and retirement plan fiduciary liability as a specialized exposure that conventional Directors and Officers coverage may not adequately address.

Errors and Omissions insurance addresses professional service errors more generally. Malpractice is associated primarily with designated professional practices such as medicine or law. Directors and Officers insurance principally protects corporate directors and officers against wrongful acts arising from organizational management, but it is not the dedicated coverage for ERISA fiduciary exposures.

The Series 17-70 outline expressly lists Fiduciary Liability under Specialty Liability Insurance.

Therefore, C provides the most directly applicable protection.