I am always interested in learning new things, isn't it?
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.
Opinions are subjective, as they can vary from person to person but facts are objective.
Pejorative means to make worse.
