Answer:
A. In the past
Explanation: Every prepositional phrase is a series of words consisting of a preposition and its object.
For a book, play, or movie it means conversation between two or more people.
The Mandela effect is a real essay since I have read many essays and huge body paragraphs with Mandela effect in it....So from background knowledge alone, your answer is True, the Mandela effect was in a real essay :)