The oncology nurse is providing a teaching session for a group of nursing students regarding the risks and causes of bladder cancer. Which statement by a student would indicate a need for further teaching?None
选项：

A:"Bladder cancer most often occurs in women."
B:"Using cigarettes and drinking coffee can increase the risk."
C:"Bladder cancer generally is seen in clients older than age 40."
D:"Environmental health hazards have been implicated as a cause."