Three sentences are given, with one word highlighted in bold in each sentence. These words are to be replaced by one single word. Choose the word from the five options provided, which is grammatically and contextually correct.
I. Movies in the romantic genre are often cheesy and fake .
II. He felt the mother's demeanour suggested she was preparing a/an bogus story.
III. This alone shows no trust on the totally fraudulent nature of his justification.