The correct answer for the question that is being presented above is this one: "(b)MADAM POTIPHAR. (ironically) Send for Joseph? It would be useless. Joseph has affairs of his own on hand, always." The piece of dialogue from The Chaste Adventures of Joseph: A Comedy most reveals Madam Potiphar’s motives for wanting her husband to replace hissecretary, Joseph is that <span>(b)MADAM POTIPHAR. (ironically) Send for Joseph? It would be useless. Joseph has affairs of his own on hand, always. </span>
A subject names the person, place, thing, or idea the sentence is about. So in this case Harley is a name of a person which is the subject. Hope this helps :)