If you want this pain killer, you’ll have to ask the doctor for a _______.

A．the problem of obesity that has obsessed the Americans for a long time
B．the problem that is of great weight and significance
C．the vital problem caused by the pills
D．the threatening situation we are facing in the long run

A．only offer temporary treatment for the morbid obesity
B．are meant for all the people who yearn for slimness
C．are too risky to be used
D．are the most important weight-loss discoveries