题目内容：
The Business of Wedding Every couple who goes to the altar (圣坛) believes that they will make that trip only once in their lives, They want the day to be perfect, and they are asking for much more than good weather．They want the most beautiful clothes, the freshest flowers．Moreover, the family who will foot the bill is not in any mood to economize.A quick look at any bride magazine will reveal that plenty of attractive goods and services compete for a share of the wedding budget．Besides the obvious choices of rings, dresses, flowers, and photographs, there are the less apparent expenses: a lavish cake, a rehearsal dinner, a reception, music for both the Ceremony and the reception, tips, and even napkins and matchbooks (书夹式火柴纸板) printed with the couple's names and the wedding date.
As the arrangements are generally complicated, there are plenty of services that can be hired to help with the planning and execution of the every aspect of the wedding: planning the photographs, selecting the wedding rings, choosing the flowers, picking the honeymoon spot, and so on．One magazine lists over 350 such pamphlets published of course by businesses who have something to offer．Considering that weddings do more than 12 billion dollars worth of business annually in the US alone, such activity isn't surprising．
What is surprising is that no one company dominates the industry．It seems that when people plan for a day as special to them as a wedding, they resist standardization．They turn instead to the small local suppliers known to them or to their friends．Family members or friends often serve as photographers, caterers (酒席承办人) and musicians．This not only helps bring the wedding cost down, but makes it more personal．
What about the couple that doesn' t want to take part in this billion-dollar industry?They can go to the City Hall and get married for less than the price of a hamburger.What does the expression "this billion-dollar industry" refer to? A．The budgets of wedding
B．The business of wedding
C．The planning and execution of wedding
D．The high wedding expense
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