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 B)after is correct as it means following in time, order, etc. The other options are wrong as with, in, and at indicate inclusion,the inside of an area, and a specific location respectively. These uses don't fit in the given question. The correct answer is B)after.