The “Loose Lips” poster is warning about the existence of spies.
Loose Lips is defined as the American English expression that means “beware of unguarded conversation” is loose lips sink ships.
During World War II, propaganda posters featured the phrase. The phrase was created verbally by the War Publicity Council and used by the US Office of War Information on posters. The poster “Loose Lips” warns of the presence of spies.
Therefore, option A is correct.
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