Which of the Following Expressions Defines the Dilution Ratio of a Sample

Which of the following expressions defines the dilution ratio of a sample?

A) $\frac{\mathrm{V}_{\text {initial }}}{\mathrm{V}_{\text {final }}}=\mathrm{C}_{\text {final }}$
B) $\frac{V_{\text {initial }}}{V_{\text {funal }}}=\frac{C_{\text {final }}}{C_{\text {inutial }}}$
C) $\frac{\mathrm{V}_{\text {initial }}}{\mathrm{V}_{\text {funal }}}=\frac{\mathrm{C}_{\text {initial }}}{\mathrm{C}_{\text {final }}}$
D) $\frac{V_{\text {inuitial }}}{V_{\text {funal }}}=V_{\text {final }}$