Hi!
A preposition is going to be a word which will connect either a noun, noun phrase, or a pronoun to another section of a sentence.
Some common prepositions are <em>with, like, through, over, </em>and <em>about. </em>
With this in mind, option C contains the preposition about!
Hopefully, this helps! =)
A common noun are words like house. Year
ddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd
By saying what you want but without your name on it
Is A, because B and C is past sense but they havent done it yet