Duration Analysis Is Sometimes Done to Understand the Sensitivity of a Bank's

Duration analysis is sometimes done to understand the sensitivity of a bank's position to changes in risk. This is most often done by calculating the duration gap, which is

A) Asset duration − Liability duration (Liability/Asset) .
B) Asset duration − Liability duration.
C) Asset duration − Liability duration (Asset/Liability)
D) Asset duration − Liability duration (Asset ×  Liability)