单选题：根据以下内容回答题：In the 1960s the West Coast became an important c

根据以下内容回答题：
In the 1960s the West Coast became an important center for rock music．Los Angeles and Southern California are famous for sunshine and surfin9．There，a quieter kind of rock called surf rock became famous．The Beach Boys sang songs like“Surfin’U．S．
A．”．“California Girls”and“Fun，Fun，Fun”．These songs made people dream about the good life in California．San 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 J0．piing，Jim Morrison and the great guitar player Jimi Hendrix were all related to drugs．
Not au of the rock musicians came from California or the U．S．A．That was the 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 1960s 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 1960s．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 parts of the city such as Harlem in New York．Musicians wrote and sang about life in the big cities．Life was diffi-cult but music and dancing made it a little easier．
Popular black music had a strong beat for dancin9．At first this music was called rhythm and blues．The l960s 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 the 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．