What does Frost mean when he says in the poem that “The fact is the sweetest dream that labor knows”?
A.
It is only labor that can make a dream a sweet fact.
B.
It is only “the sweetest dream” that can become a fact.
C.
It is only fact that can become “the sweetest dream.”
D.
It is only through labor that “the sweetest dream” can come true or become a fact.