The Formula That Links Checkable Deposits to the Monetary Base $\mathrm{m}=\frac{1}{\mathrm{rr}+\mathrm{e}+\mathrm{c}}$

The formula that links checkable deposits to the monetary base is

A) $\mathrm{m}=\frac{1}{\mathrm{rr}+\mathrm{e}+\mathrm{c}}$ .
B) $M=\frac{1}{r r+e+c}$ .
C) $\mathrm{M}=\frac{1+\mathrm{c}}{\mathrm{rr}+\mathrm{e}+\mathrm{c}}$ .
D) $\mathrm{D}=\frac{1}{\mathrm{rr}+\mathrm{e}+\mathrm{c}}$ .
E) $\mathrm{D}=\frac{1}{\mathrm{rr}+\mathrm{e}+\mathrm{c}} \times \mathrm{MB}$ .