In the Romer Model, the Growth Rate of Knowledge Is $\frac { \Delta A _ { t + 1 } } { A _ { t } } = \bar { \ell }$

In the Romer model, the growth rate of knowledge is given by:

A) $\frac { \Delta A _ { t + 1 } } { A _ { t } } = \bar { \ell }$
B) $\Delta A _ { t + 1 } = \frac { \bar { z } \bar { \ell } \bar { L } } { A _ { t } }$
C) $\frac { \Delta A _ { t + 1 } } { A _ { t } } = \bar { z } \bar { l }$
D) $\frac { \Delta A _ { t + 1 } } { A _ { t } } = \bar { z } \bar { \ell } \bar { g }$
E) $\frac { \Delta A _ { t + 1 } } { A _ { t } } = \bar { z } \bar { l } \bar { L }$