题目

Forget Miami, Los Angeles and New York. The next big Latin music explosion is on its way in secondary markets across the United States, and the numbers are there to back it up. Among all genres（种类）,Latin music was the only one registering growth in 2005. From tiny Vero Beach in northern Florida to Des Moines, Iowa, in the heart of the Midwest, from Charlotte, N. C．to Salt Lake City, Latin music sales are skyrocketing. Wilson says there are two major reasons for the increase. One is simply the Hispanic（说西班牙语国家的） population's increase in specific areas, which encour已知x，y，z满足，则的值为（ ）A．1B．C．D．