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 不知道该选哪个,请nn们指教 | 
