During the 1930s, Banks Found It Hard to Solve the Asymmetric

During the 1930s, banks found it hard to solve the asymmetric information problem between borrowers and lenders, because ____.

A) Many borrowers lacked adequate collateral.
B) Changing federal bank regulations created uncertainty
C) The fall in the stock of money reduced aggregate demand.
D) Interest rates had fallen to "liquidity trap" levels.