Answer:
D. "And could you wed you to another?"
Step-by-step explanation:
Both options A ("She would sit, her hand in mine by the hour of a Sunday afternoon."), B ("Rose-Anna of the Mill and I - we courted and was like to marry.") , and C ("No - let her go her way and wed her fancy man.") are talking about Lubin's past--which is revealed to be a sad background, of failed love.
(another clue is that these are all past-tense, which [the past] ruined his hope)
When he sees that someone else has gone through something similar, and he asks a question about if it might work out for her, he is likely imagining himself in her position (because they are similar). So, this line of curiosity "And could you wed you to another?" reveals Lubin has developed hope for finding love again.
hope this helps! have a lovely day :)