A、A German baker. B、An American seller. C、A popular expression. D、A German dog. C细节题。关键在．．．the expression“doggy’’was popular．“Do

It is believed that the hot dog was born in Germany. Its creator, a German butcher named Johann Georg Lahner developed its prototype first in Frankfurt, a German city, hence frankfurter as its name. When frankfurters were first sold in the United States at the beginning of this century, they were called "dachshund sausage". A dachshund is a lovely dog from Germany with very long body and short legs. "Dachshund sausage" seemed like a good name for the frankfurter.
    Dachshund sausages became popular soon in New York, especially at baseball games. Sellers sold their "red hot dachshund sausages" on buns to the fans. One day a newspaper cartoonist named Tad Dorian went to a game. When he was sold a dachshund sausage, he got an idea for a cartoon. He sketched a dachshund—not a dachshund sausage, but a dachshund—in a roll. Because he did not know how to spell dachshund, he wrote "Get your hot dog" under the cartoon. Thus, the American hot dog was born.
    Another explanation for the origin of its name seemed somewhat academic. A sausage first got "hot" as its name because sausage sellers used to yell "Hot! Hot? on the street to get people to buy their sausages. When frankfurters were first imported to the United States, the expression "doggy" was popular. "Doggy" was a shorter form of a popular expression "to put on the dog", which meant fancy, costly, in the best style. So "doggy hots" was used to refer to the imported,  costly, and fancy frankfurters. Soon, these "doggy hots" were called "hot dogs" for cinvenience.