求教885 section 16-10

10.   During the 1980’s approximately $50 billion in private investment capital is estimated to have left Mexico and added to the strain on the country’s debt-ridden economy.

(A) During the 1980’s approximately $50 billion in private investment capital is estimated to have left Mexico and added

(B) During the 1980’s it is estimated that approximately $50 billion in private investment capital left Mexico and added

(C) It is estimated that there was approximately $50 billion in private investment capital that left Mexico during the 1980’s and added

(D) It is estimated that during the 1980’s approximately $50 billion in private investment capital left Mexico, adding（D）

(E) Approximately $50 billion in private investment capital is estimated as having left Mexico during the 1980’s, adding

我觉得B更好，during the 1980's 的位置从逻辑上怎么判断？

Choice B sounds like that the estimation was done during the 80's.

Thanks!

我忽略这个问题了