Mrs. Higgins's behavior at the drugstore is ironic because she —

a
hurries to arrive well before the police can get there
b
arrives dressed in a hat and coat in spite of the late hour
c
acts friendly and dignified instead of frightened or angry
d
takes the place of her husband, who usually rescues Alfred

Something there is that doesn't love a wall, that sends the frozen-ground-swell under it, and spills the upper boulders in the sun; and makes gaps even two can pass abreast. the work of hunters is another thing: i have come after them and made repair where they have left not one stone on a stone, but they would have the rabbit out of hiding, to the yelping dogs. the gaps i mean, no one has seen them made or heard them made, but at spring mending-time we find them there. whom does the speaker blame for the gaps in the wall? himself his neighbor nature and hunters rabbits and dogs