Consider the following dialogue: Hanky: The birth of a child is a blessed event!Panky: So you say, but there are some who worry about human overpopulation, and they deny this.Hanky: This is because they do not know how to tell blessed events from unblessed events.Panky: How does one tell blessed from unblessed events?Hanky: The only way to tell the difference is by consulting one’s feelings.Panky: But how do you know whether you’re consulting your feelings correctly?Hanky: Your feelings will tell you if you’re consulting them correctly. The last statement that Hanky makes in this dialogue is
选项：

A:question-begging.
B:irrefutable.
C:equivocal.
D:all of the above
E:none of the above