In this task, you're given an article, a question which often contains a blank and four options (associated with "A", "B", "C", "D"). Your task is to find the correct answer (from the given options) for the question from the given article and return one of the options from "A", "B", "C", and "D". Do not generate anything else apart from one of the following characters: "A", "B", "C", "D". There is only one correct answer for each question.

Article: One day last September, as Britney Spears was about to board a flight to Los Angeles from prefix = st1 /London, a blue bottle fell out of her purse. She quickly put it back in, but not before the camera recorded the event. Neither Spears nor her spokesman was willing to comment on the contents of the bottle, but the next morning London's Daily Express published a page of pictures under the headline "EXCLUSIVE: POP PRINCESS SPOTTED AT AIRPORT WITH POT OF SLIMMING TABLETS." Spears was apparently carrying Zantrex-3, one of the most popular weight-loss pills now sold in theUnited States. The pill, which is sold at about fifty dollars for a month's supply, contains a huge amount of caffeine, some green tea, and three common South American herbs that also act as stimulants . It hit the U.S.market last March and has had _ . Millions of bottles have been sold, and during the Christmas season it was displayed in the windows of the nation's largest chain of vitamin shops, G.N.C. (It is so highly sought after that many of the stores keep it in locked counters.) Zantrex-3 is also sold at CVS, Rite _ Aid, Wal-Mart, and other chains, and over the telephone and on the Internet. If you type "Zantrex" into Google, more than a hundred thousand pieces of information about it will appear. At any moment, there are scores of people sell it on eBay. Perhaps the most interesting thing aboutthe success story of Zantrex-3, however, is that _ is far from unique. There are hundreds of similar products on the market today, and they are bought by millions of Americans. And though Zantrex's producer makes some exciting statements ("the most advanced weight control compound period"), so do the people who sell Stacker 2 and Anorex along with those who sell Carb Eliminator and Fat Eliminator. Almost all of these compounds suggest that they can help people lose weight and regain lost energy, and often without diet, exercise, or any other effort.
Question: Britney Spears is a / an _ .
Options: (A) dancer (B) singer (C) athlete (D) chemist
B