Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now listen to the passage. A young husband has to work for his wife’s family in some societies ______
A．because he has to wait until he has three children B．because he has to make enough money for his wife’ s family C．because it is a necessary ceremony at marriage D．because it is a necessary type of gift to exchange at marriage