How can you determine the theme in a story?

Based on these dialogue samples, what is larry's social role most likely to be? a judge a professor a bartender a senator done anna christie by eugene o'neill (excerpts) larry: he’s still got that same cow livin’ with him, the old fool! . . . . . . . . . . . . . . . . larry: that’s a fine fairy tale to be tellin’—your daughter! sure i’ll bet it’s some bum. . . . . . . . . . . . . . . . . larry: this girl, now, ’ll be marryin’ a sailor herself, likely. it’s in the blood.