Prices for the Lunar New Year's eve dinners in 2007, the most important dinner for the Chinese people, will be 5 to 9 percent higher as restaurant reservations boom for the festival, Shanghai Morning Post reported on Thursday. This year, the Lunar New Year's eve festival falls on February 17. The tradition meal, know as nianyefan, is for family reunions in prefix = st1 /Chinaand to enjoy a homecoming feast, similar to Christmas dinners in the west. "Agricultural products are more expensive than previous years, and this directly leads to the prices increase of nianyefan," Xia Xiangqing, a senior official with the Shanghai Restaurants Association, told the newspaper, "Labour and transport also cost more." Up till a few years ago, almost every family in the city ate at home or the home of a close  , with restaurants shutting down for the evening. However, most families in the city now prefer to head out to a restaurant on that night to save the trouble of cooking and cleaning at home. In fact, "if you haven't reserved a table yet, you may be out of luck as most of the city's restaurants are already booked before the new year," Xia said. "In the past, restaurants decided everything," Xia said. "They sometimes refused to return the customers deposit  if they wanted to cancel their reservation." Xia also told the newspaper yesterday that the association is working on some standards for nianyefan to avoid complaints from customers. What is the reason for the price rise of Spring Festival dinner according to the passage?
The location of the restaurant The number of the customers The time of having the dinner The cost of dinner