【单选题】

Questions 29 and 30 are based on the following news.At the end of the news item, you will be given 10 seconds to answer the questions.

Now listen to the news.
What is the purpose of the mentioned federal lawA．To prevent illegal immigrants from getting marrieD、
B．To facilitate the collection of child support payments.
C．To prevent citizens from getting marrieD、
D．To put people’s wedding plans on hol