Approximately $120 billion in venture capital is estimated as having poured into technology stocks during the late 1990s, creating a valuation bubble that burst in 2000.
A. Approximately $120 billion in venture capital is estimated as having poured into technology stocks during the late 1990s, creating -
there is no reference for it and having poured i.e. present progressive tense is not required.
B. During the late 1990s approximately $120 billion in venture capital is estimated to have poured into technology stocks and created
And creates two different independent clauses which is not the case here.
C. During the late 1990s it is estimated that there was approximately $120 billion in venture capital that was poured into technology stocks, creating
Addition of there was indicates that the venture fund had only $120bn which is not the case
D. It is estimated that during the late 1990s approximately $120 billion in venture capital poured into technology stocks, creating
Sounds logical and active voice.
E. It is estimated that there was approximately $120 billion in venture capital that poured into technology stocks during the late 1990s and created
Same as C