根据时间管理矩阵，每个人每天应做哪一类事情（）

A.重要且紧急的事

B.重要而不紧急的事

C.不重要但紧急的事

D.不重要也不紧急的事

How did Benjamin Graham view stock investment
a. He believed that both trading stocks and investing stocks are risky.
b. He regarded investing stocks equally risky as trading stocks.
c. He insisted that trading stocks were less valuable than investing stocks.
d. He compared hot stocks to fashionable dogs.