The Authority has the power to

The question pertains to the fundamental legal capacities of an 'Authority', which often refers to a corporate body or a government entity with legal personality. Option A, "Sue and be sued," is correct because it is a core attribute of legal personality, enabling an entity to participate in legal proceedings, enforce rights, and be held accountable. Without this capacity, an entity cannot function effectively in a legal system.

• Option B, "Change the Constitution," is incorrect as this power is reserved for legislative bodies through specific amendment processes.
• Option C, "Appoint the Chief Justice," is incorrect; this is typically an executive or judicial appointment power.
• Option D, "Levy taxes," is incorrect; this is a sovereign power usually vested in the legislature.