Contributing to Asia's 1997 Financial Crash Was

Contributing to Asia's 1997 financial crash was:

A) heavy borrowing overseas in dollars by banks and firms whose earnings were in local currency.
B) the weak balance sheets of many Asian banks whose customers were often not solvent either.
C) the fact that in Thailand, Malaysia, and Indonesia foreign loans were sometimes used to finance real estate speculation.
D) All of the above.
E) None of the above.