The answer is D
extra wording XD
By finding a common interest that both of those people would have whether it is music, Political views, culture or religion etc;
Well, after researching, The correct answer would be B. He is not entirely trustworthy.
A. Fiction and non-fiction can have a persuasive purpose.
It doesn't just have to be one genre, you just have to make it interesting, to grab the readers attention. That's basically what persuasive means.