Why does Abigail Adams describe herself as feeling cheerful and lighthearted in the March 31st (opening) section of her “Letter to John Adams”?

A. because the colonies are about to declare independence from Britain
B. because she knows that her husband will return home in the near future
C. because the immediate military threat has been lifted from the Boston area
D. because she has kept the family together during a difficult and stressful time