单选题 An investor invested $ 10000 into an account five years ago. Today, the account value is $18682. What is the investor's annual rate of return on a continuously compounded basis?

A、

A. 13.31%.
B、

B. 11.33%.
C、

C. 12.50%.

【正确答案】 C

【答案解析】
In (18682/10000)=0.6250/5=12.50%
Or:
(18682/10000)^1/5=1.133143
In(1.133143)=12.4995%