Questions 27 and 28 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 news item mainly about

A．The history of the early Mrican-American experience.
B．The rediscovery of the site of the burial ground of the Africans.
C．The first national memorial in the United States to address slavery.
D．The hardships of the earlier African-American experienc