Which event can help develop the theme of love and duty in a story about two brothers in their early twenties, orphaned as infants, who care for each other, and as they have no other relatives, cannot bear to part?


One of the brothers falls ill with pneumonia.
One of the brothers falls in love with a woman in a foreign town.
One of the brothers joins a secret society in their town.
One of the brothers picks a fight with their landlord