Answer:
It means you are unaware of something
Explanation:
She unwittingly walked in the wrong house
The answer you are looking for is credo
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The correct answer is b) A president addressing the nation.
Oration is a formal speech given usually at an official occasion, such as a president giving a speech. Orations are usually given at funerals, weddings, formal ceremonies, such as graduation, in the court of law, at conferences, inaugurations, etc.