The phrase "close his options" in the last paragraph means "______".

A．Usually Arabs may not make prompt decisions.
B．You should act as though you do not hear while a stranger comes in to speak with your host.
C．You should leave angrily because of interruptions.
D．You will have to discuss business in front of strangers.

A．spend some time being polite and offering refreshments first
B．ask you to wait for several minutes first
C．introduce you to some strangers first
D．start talking business immediately