Which of the following statements regarding the leverage$-$adjusted duration gap is true?

A$.$

It indicates the severity of maturity mismatch in a financial institution's balance sheet.

B$.$

It is calculated as duration divided by $(1+$YTM$).$

C$.$

It is defined as the weighted$-$average duration of the assets minus the weighted$-$average duration of the liabilities.

D$.$

A larger gap $($positive or negative$)$ suggests that the financial instituation has more exposure to interest rate risk.