Which of the following statements is correct?

A. If a firm has set up a revolving credit agreement with a bank, the risk to the firm of being unable to obtain funds when needed is lower than if it had an informal line of credit.

B. Uncertainty about the exact lives of assets prevents precise maturity matching in an ex post (i.e., after the fact) sense even though it is possible to match maturities on an ex ante (expected) basis.

C. A promissory note is the document signed when a bank loan is executed, and it specifies financial aspects of the loan.

D. Funds from short-term loans can generally be obtained faster than from long-term loans for two reasons: (1) when lenders consider long-term loans they must make a more thorough evaluation of the borrower's financial health, and (2) long-term loan agreements are more complex.

Please provide reason why each statement is or isn't correct.