When assessing a client with chest pain, the nurse obtains a thorough history. Which statement by the client is most suggestive of angina pectoris

A．"The pain lasted for about 45 minutes. "

B．"The pain resolved after I ate a sandwich. "

C．"The pain worsened when I took a deep breath. "

D．"The pain occurred while I was mowing the lawn. "

漏征率计算：设漏征车辆数为V，车流量总数为Q，漏征率为P，P=（）。