A Relatively Recent Term That Points to the Complexities of Understanding

A relatively recent term that points to the complexities of understanding the concept of age is "emerging adulthood." Emerging adulthood can best be understood as

A) the transition from working life to retired life.
B) the period of time from late adolescence until one's early to mid 20s.
C) the transition from early to late adolescence.
D) the period of time during which one's children leave home resulting in an "empty nest."