问题如下：
Peter collects the following information about two companies A and B:
Which of the following statements is most accurate?
选项：
A.A has the higher trailing P/E multiple and lower current estimated P/E multiple.
B.A has the higher trailing P/E multiple and higher current estimated P/E multiple.
C.B has the higher trailing P/E multiple and lower current estimated P/E multiple.
解释：
B is correct.
P/E = Current price/EPS, and Estimated P/E = Current price/Estimated EPS.
A P/E = 55/2= 27.5
A estimated P/E= 55/5= 11
B P/E = 20/3 = 6.67
B estimated P/E = 20/2 = 10
请老师解释一下 leading p/e 和 trailing p/e
