What does "—it's just not done" mean here It means that no one in Thailand ______.

A．In Bulgaria, you are likely to be left thirsty if you nod when offered a drink.
B．In Bulgaria, nodding one's head is a sign of agreement or acceptance.
C．Your Arabic host won't refill your drinking vessel if you don't insist.
D．In countries on the Arabian Peninsula you must shake your head to signify "yes".

A．being able to marry a new wife whenever he pleases
B．being bound for life with his wife by marriage
C．being able to insist that his wife takes a job while he is at school
D．having the right to demand that his wife performs a wife's duties entirely at home when he has got a job