The word "curb" (Line 1, Para. 4) is closest in meaning to______.

A．consuming countries are confronting a serious drug problem
B．drug problem has become more serious than ever
C．drug trafficking gangs are often allied with terrorists
D．drag abuse is undermining their government

A．it is hungry cells that make you stop dieting
B．keeping a diet is not the best method of losing weight
C．overweight is caused by fat cells
D．if you want to lose your weight, you should follow a strict diet