The Term "Empty Nest" Is Not Used as Often as in the Past

The term "empty nest" is not used as often as in the past to refer to the middle adulthood phase of the family life cycle because

A) many middle-aged adults are raising at least one grandchild.
B) it implies a negative transition,especially for women.
C) the baby boomers are less financially well-off and,thus,often return home to "the nest."
D) the majority of middle-aged people in the United States already live alone.