单项选择题
The revenue from lottery ticket sales is divided between prize money and the various uses shown in the graph labeled "Proceeds." In 1997, what per-cent of the money spent on tickets was returned to the purchasers in the form of prize money
A．23.5%
B．50%
C．60%
D．66%
E． 74%
B．50%
C．60%
D．66%
E． 74%