Answer:
Based on the text, the prediction that is most valid would be The man will ask a woman to marry him.
Step-by-step explanation:
From the excerpt, the man is pessimistic about something and he admits to himself that he does not have a "ghost of a chance" of succeeding and that the very idea was "preposterous" that he would totally understand if the woman's father would object.
He believes his act was one of "desperation" because this was his "last day in England" and the final clue given that he was about to ask a woman to marry him was that he talked about having an existing "affair" with the lady.