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?"
The line of dialogue "How could I have asked for a more rewarding evening?" reveals a few things about Dave's character:
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.
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