A Major Cause of the Panic That Broke in 1873

A major cause of the panic that broke in 1873 was

A) the issuance of millions of dollars in greenbacks.
B) the expansion of more factories, railroads, and mines than existing markets would bear.
C) a credit crunch caused by extremely high interest rates.
D) Wall Street's fears about the power of the radical Greenback Labor party.
E) excessive speculation in mining stocks.