【单选题】

Questions 28 to 30 are based on the following news.At the end of the news item, you will be given 15 seconds to answer the questions.

Now, listen to the news.
What is the disadvantage of these ball girlsA．They are too young for the big event.
B．They often disrupt the rhythm of the game.
C．They do not have much relevant knowledge.
D．They cost too much money.