明明从2009年2月20日到3月6日去上海姑姑家，他一共去了[ ]

A.15天

B.16天

C.17天

An investor currently has a portfolio valued at $700 000. The investor’s objective is long-term growth, but the investor will need $ 30 000 by the end of the year to pay his son’s college tuition and another $10 000 by year-end for his annual vacation. The investor is considering three alternative portfolios.（）

A．portfolio

B．expected return

C．standard deviation of returns

D．

1

2

3

E．

8%

10%

14%

F．

10%

13%

22%