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.
<span>Oh say I would consult reliable sources, how I would know that it was reliable is by looking at the link! if it has edu. or anything proven to be reliable, I will choose it. I will not go on wiki because it is informal and some of the given information can be wrong.</span>