Final answer:
In Navy correspondence, the civilian date format is expressed as YYYY/MM/DD, which is the international standard used to ensure clarity and prevent confusion in military communication.
Step-by-step explanation:
The civilian format for date in Navy correspondence is typically expressed as option C) YYYY/MM/DD. This formatting style is standard for most military correspondence, including the Navy, where precision and a standard format are important for clear, unambiguous communication. While the civilian sector may use different formats, such as MM/DD/YYYY or DD/MM/YYYY depending on the country, the military adheres to the international standard of YYYY/MM/DD to avoid confusion, particularly in an international or operational context where clarity is critical.