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 D)after is correct as it following in order, time etc. The other options are wrong as of, in, and from indicate possession, the inside of an area, and a source respectively. These uses don't fit in the given question. The correct answer is D)after.