Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now listen to the passage. What did a recent research show

A．Private-school kids slightly outperformed public-school kids.
B．Public-school kids slightly outperformed private-school kids.
C．Private-school kids slightly outnumbered public-school kids.
D．Public-school kids slightly outnumbered private-school kids.