The line of dialogue which most seems to contribute to reader's understanding of Dave's character is "How could I have asked for a more rewarding evening?"
<h3>What does the line reveal?</h3>
The line of dialogue "How could I have asked for a more rewarding evening?" reveals a few things about Dave's character:
He will do something he does not enjoy if there is a reward involved.
He has a sarcastic quality to his personality.
He is focused on the future.
That is why option 1 seems to be the best answer. Both options 2 and 3 basically review that Dave is methodical. Option 1, however, shows all those traits he has.
