— Oh! Must you? Stay a bit longer, please.

—     , but I've got an early start tomorrow.

A．No problem

B．All right

C．Thanks anyway

D．Never mind

In their efforts to persuade us to buy that product,shopkeepers have made a close study of human

nature and have ________ all our little weaknesses. [    ]

A. divided  

B. arranged 

C. classified  

D. separated