PLEASE HELP 40 POINTS AGAIN!!!!!!

Every fourth year, at the vernal equinox, there is a representative council of the whole nation, which meets in a plain about twenty miles from our house, and continues about five or six days. . . . One of these grand assemblies was held in my time, about three months before my departure, whither my master went as the representative of our district . . . . The question to be debated was, whether the Yahoos should be exterminated from the face of the earth. What is the dominant irony presented in the passage above? that the narrator (Gulliver) is able to live in Houyhnhnm Land during one of the “grand assemblies” that the Houyhnhnms and the Yahoos, who dislike each other, still live together in the same country that “representative councils” are only held every four years in the spring that the Houyhnhnms, the most rational beings on earth, are discussing the extermination of an entire group of creatures