Which sentence uses incorrect pronoun-antecedent agreement?
w. cats and dogs will never get along because they are so different from each other.
x. my aunt says she wants to take the train down to visit me.
y. the top wrestler on the men's team says that his knee hurts too much to wrestle.
z. the boys in my class all say that math is his favorite subject.
a. sentence y
b.
sentence z
c. sentence w
d. sentence x

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