The Fisher Relationship May Be Described by the Following Equation $R$

The Fisher relationship may be described by the following equation in which $R$ is the nominal rate of interest, $r$ is the real rate of interest, and $i$ is the inflation rate.

A) $i = r + R$
B) $r = R + i + i r$ .
C) $1 + i = \frac { 1 + r } { 1 + R }$
D) $1 + r = \frac { 1 + R } { 1 + i }$
E) $1 + r = \frac { 1 + i } { 1 + R }$