妊娠期甲状腺功能亢进症的禁忌治疗是（）。

A.ATD治疗

B.以上都是

C.PTU治疗

D.手术治疗

E.RAI治疗

An investor buys one share of stock for $100. At the end of year one she buys three more shares at $ 89 per share. At the end of year two she sells all four shares for $ 98 each. The stock paid a dividend of $1.00 per share at the end of year one and year two. What is the investor’s time-weighted rate of return（）

A. 6.35%.

B. -2.0%.

C. 0.06%.