In the Special Case Where $\beta = 1$ , and with Logarithmic Utility, the Euler Equation Is Given

In the special case where $\beta = 1$ , and with logarithmic utility, the Euler equation is given by:

A) $\beta = ( 1 + R ) = 1$
B) $c _ { \text {today } } = ( 1 + R ) c _ { \text {future } }$
C) $c _ { \text {today } } = ( 1 + R ) c _ { \text {future } } = \beta$
D) $$y _ { \text {future } } = f _ { \text {today } } = y _ { \text {todey } }$$
E) $$\left( 1 / c _ { \text {todey } } \right) = ( 1 + R ) \left( 1 / c _ { \text {future } } \right)$$