The correct option is E turning the joke back around on him
The correct answer for this would be option E, i.e., the boy turning the joke around on his father. The father-son pair and the poet, all of them are aware of the running joke where they are testing each other. Here, "putting it up to him" refers to the son standing his ground refusing to give in to his father, and the cycle of jokes that goes around between them. The statements of options A,B,C and D do not convey the same sentiments as the latter option, neither do they imply what the poem is trying to say. Thus, they are incorrect in this context.