Who is the current U.S Secretary of the Navy?

The correct choice identifies the individual who holds the position known as the Secretary of the Navy. This role is critical in overseeing the U.S. Navy's operations and policies. The Honorable John Phelan has been appointed to this position, reflecting his responsibilities which include managing naval personnel, strategy, budget, and resources.

The other choices presented do not currently align with the Secretary of the Navy role. Specific individuals mentioned may hold or have held other significant military or government positions but are not serving in this particular capacity. Understanding the roles of these individuals and their contributions within the military structure can provide further context into the hierarchy and operations of naval leadership.