The answer is:
D) It adds lightheartedness ro the stressful preparation of the wedding feast.
In Romeo and Juliet in the immediate before act, Juliet just told her father that she doesn´t want to marry with other tham Romeo, and the ambience is stressed because of the big wedding, with a comic relief the audience can get off its nerves a little bit before the great wedding and catastrophe that´s about to come.