Which of the following plays a more important role in London’s tea markets（）

A．she wants to have another job as well as the first one
B．she wants to spend more time on her university studies
C．she feels very exhausted while doing a full-time job
D．the circumstances of the hotel where she is working now is terrible

A. are in the possession of each individual
B. are something exchanged for money
C. are not familiar to highly educated people
D. are not included in a book