A、10,500 B、15,000 C、75,000 D、Not known how many D正确理解相关定语从句的内容，有助于解题。

The German port of Hamburg has been offered ＄10,500 to change its name to "Veggieburg" by animal rights activists who are unhappy about the city’s association with hamburgers. "Hamburg could promote animal welfare and court sympathy for animals by changing its name to Veggieburg," the People for the Ethical Treatment of Animals (PETA) wrote in a letter sent to Hamburg Mayor. The German chapter of PETA, which claims 750,000 members worldwide, said the organization would give Hamburg’s childcare facilities 10,000 euros worth of vegetarian burgers if the city changed its name. But city officials in Hamburg, Germany’s second largest city which traces its roots to the ninth century, were unmoved. "I cannot afford to waste my time with this. I don’t even want to look at nonsense like this," said Klaus May, a city government spokesman. "But that doesn’t mean we Hamburgers don’t have a sense of humor." In its letter, PETA said the name Hamburg conjured up images of "unhealthy beef patties made of pulverized dead cattle" and "millions of people fall ill each year with fatal ailments like heart disease, cancer, strokes and diabetes from eating hamburgers."
    The original "hamburger steak", a dish made of ground beef, traveled west with German migrants to the United States in the 19th century. The first mention of "hamburgers" appeared on a menu in a New York restaurant in 1834. Some historians trace its origins to a minced beef sandwich once popular with sailors in Hamburg. The city name "Hamburg" comes from the old Saxon words "ham" (meaning bay) and "burg" (meaning fortress). PETA recently made a similar offer to the US town of Hamburg, New York. But their ＄15,000 bid was rejected.