The correct answer is A, off. The word 'off' can be used as a preposition as well as an adverb. In this scenario, it is used as a preposition. As a quick refresher, a preposition is defined as a governing word to express a relation between two words or elements in the sentence structure.
For this sentence, removing the books from the table will occur before dinner. It's important to realize that although the word 'from' can technically be used, the word off is the most correct choice. This is because the word 'off' implies something has been removed from or gotten rid of.
The correct preposition for this is A. off. Off may be used as an adverb and it can also be used as a preposition. In this case, it is being used as a preposition. This is normally used to describe something that is about to leave or if you are describing yourself and your intention to leave the place.
This can be used for the sentence given in the question because it signifies that the books need to be removed from the table before eating dinner. Some examples of using off are the following: The wind blew some leaves off the balcony. She had to scrape off the wallpaper from the walls. She got so surprised that she fell off the chair.