A、South Africa’s multiracial history. B、Musical New Year’s tradition in South Africa. C、Southeast Asia slaves in Cape Town. D、Ca

The New Year in South Africa brings thousands of residents to the streets for a colorful minstrel parade. Brightly-costumed marching choral groups celebrate a unique aspect of South Africa’s multiracial history.
Cape Town’s musical New Year’s tradition dates back more than a century, to the days when Dutch colonists brought slaves here from Southeast Asia. The slaves served as dockworkers, farm laborers and household servants. And, they were given one day off per year. Ethnomusicologist (种族音乐学家) Sylvia Bruinders at the University of Cape Town says the slaves took to the streets. The slaves copied European and American minstrels who visited the Cape. Eventually, a distinctive South African sound developed.
Today the minstrels are a holiday tradition among Cape Town’s mixed-race or "colored" residents, many of whom are descendants (后代) of slaves. A downtown parade involves thousands of participants. Dozens of minstrel troupes practice throughout the year.
1.  What is this news report mainly about?
2.  Who brought the Southeast Asia slaves to Cape Town?