I think that it is c because it seems the only one to be right and if you look at the picture it is obviously right. Hope this helps.
An adjective is a part ofspeech which describes, identifies, or quantifies a noun or a pronoun. So basically, the main function of anadjective is to modify a noun or a pronoun so that it will become more specific and interesting.
A statement of the author’s purpose in writing the book, which may include suggestions for using the book
Something that is argueable is debateable.
