The underlined word "they" ( paragraph 5 ) refers to ______.

A．the writer is still a teenager
B．the writer is now a middle-aged woman
C．Monkey Tom got angry for being left alone
D．Uncle Tom has a monkey-like face

A．keeping stuffed animals is babyish
B．maturity doesn't mean growing up and taking on more responsibility
C．one should keep to his childhood and act young sometimes even when he has grown up
D．human beings should be kind to animals