Choose the option that fills the blank with the most suitable word:
A preposition is a word which comes before a noun or a pronoun and establishes a relationship between the elements of a clause or words. Option A)after is correct as it means following in place, order, etc. The other options are wrong as with, from, and through indicate inclusion, a source, and from one end to the other respectively. These uses don't fit in the given question. The correct answer is A)after.