单选题：根据以下资料，回答题： In the 1960s the West Coast became an important

根据以下资料，回答题：
In the 1960s the West Coast became an important center for rock music．Los Angeles and Southern California are famous for sunshine and surfing．There, a quieter kind of rock called surf rock became famous. The Beach Boys sang songs like “Surfin’ U．S．A．”，“ Califorlia Girls” and“ Fun，Fun，Fun”．These songs made people dream about the good life in Califomia．
Sam Francisco was a center for young people and rock music in the late l960s．This was the time of the Vietnam War， student protest，hippies， and drugs．Hippies talked about love and peace. They wore brightly colored clothes and had long hair．They listened to rock and folk-rock music．
Drugs were a serious problem during that time．The deaths of three young rock stars, Janis Jo-pling，Jim Morrison and the great guitar player Jimi Hendrix were all related to drugs．
Not all of the rock musicians came from California or，the U．S．A．．That was me time of the great British rock groups like the Beatles and the Rolling Stones．British rock musicians had a very important place in the rock music of the l960s in America．
Another kind of softer rock music was created by the singers．Singers like Joni Mitchell and James Taylor wrote their own lyrics and their own music．Their songs were about love and friend—ship，good and bad times．
In the l960s big rock concerts were very welcomed by everyone．The most famous concert was Woodstock．In 1969 in New York State，a million young people came together to hear the rock stars.This peaceful Woodstock concert was the most important musical event of the l960s．
After World War II a great number of black people moved from the South to the big industrial cities like New York，Detroit，and Philadelphia． Many black people lived in poor part of the city such as Harlem in New York．Musicians wrote and sang about life in the big cities．Life was difficult but music and dancing made it a little easier．
Popular black music had a strong beat for dancing．At first this music was called rhythm and blues.The 1960s called it soul.
In Detroit, a black musician named Berry Gordy set up an all black record company. It was called Motown．Motown or motor town is another name for Detroit, where cars are made. Most of me．famous soul musicians like the Supremes，the Temptations，and the Jackson Five recorded with Motown．

Where in the United States did pop music first emerge? A．The West．
B．New York．
C．The South．
D．San Francisco．