Noun ,pronoun,gerund or clause the "object" of the preposition.
Answer: Think of what he done for you, thank him for what he did, and then celebrating father's day would be nicer.
Explanation: For father's day I always think of what my dad did for me and then thank him for it and my day with him is much funner. Last year we went to the theaters so much fun! But yeah just think and then thank and enjoy your day.
I THINK ITS B ( sorry if im wrong! )
