For a constant hydraulic stress on an object, the fractional change in the object's volume $\left(\frac{∆\mathrm{V}}{\mathrm{V}}\right)$and its bulk modulus (B) are related as:

• A

  $\frac{∆\mathrm{V}}{\mathrm{V}}\infty \mathrm{B}$

• B

  $\frac{∆\mathrm{V}}{\mathrm{V}}\infty \frac{1}{\mathrm{B}}$

• C

  $\frac{∆\mathrm{V}}{\mathrm{V}}\infty {\mathrm{B}}^2$

• D

  $\frac{∆\mathrm{V}}{\mathrm{V}}\infty {\mathrm{B}}^{-2}$