单项选择题

假定年利率为10%，每半年计息一次，则有效年利率为( )。

A.5%

B.10%

C.10.25%

D.11%

Humility is the beginning of wisdom. 智慧源于谦逊.
A ship in harbour is safe-but that is not what ships are for. 船停泊在港中固然安全，可是这并非造船的目的。