Deregulation of the banking industry
Deregulation allowed savings and loans to pursue riskier investments than they had before. Coupled with this is that Reagan's budget cutting measures also reduced staffing at the Federal Home Loan Bank Board, which was responsible for regulations that were in place.
The Chinese people invented the Seismometer during the Han dynasty to help predict natural disasters. The Seismometer measured the motion of the ground, and things included of seismic waves such as, earthquakes, volcanoes, and other things that involve explosions that are generated by seismic waves.
D, because America recently got out of the Great Depression.
In which time period exactly?