From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences: Government official...

From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences:
Government officials have to swear to .......of secrecy

Answer Details

The word that best completes the sentence is "an oath." The phrase "swear to" implies the act of taking an oath or making a solemn promise to keep a secret or abide by certain rules or regulations. Therefore, "an oath" is the most appropriate word that fits in the blank space.