In General,the Capital Structures Used by U.S.firms

In general,the capital structures used by U.S.firms:

A) tend to overweight debt in relation to equity.
B) are easily explained in terms of earnings volatility.
C) are easily explained by analyzing the types of assets owned by the various firms.
D) tend to be those which maximize the use of the firm's available tax shelters.
E) vary significantly across industries.