How many silver bars represent the rank of Lieutenant (O-3)?

The rank of Lieutenant (O-3) in the military is denoted by two silver bars. This insignia is a standardized form of rank insignia across various branches of the armed forces, reflecting a specific level of authority and responsibility. The presence of two silver bars is a clear and recognized symbol that distinguishes a Lieutenant from ranks below and above it, such as Captain or Ensign.

The other choices do not align with the established insignia for Lieutenant. One silver bar represents the rank of a Lieutenant Junior Grade (O-2), while the three silver stars would typically symbolize a much higher rank, such as a three-star General. One gold bar is the insignia for an Ensign (O-1). Therefore, two silver bars accurately represent the rank of Lieutenant (O-3), making this the correct answer.