In the Romer Model, ________ Is the Resource Constraint $K = \bar { K }$

In the Romer model, ________ is the resource constraint.

A) $K = \bar { K }$ and $L = \bar { L }$
B) $L _ { t } = L _ { y t } + L _ { a t }$
C) $A _ { t } = \infty$
D) $Y _ { t } = A _ { t } K _ { t } ^ { a } L _ { t } ^ { 1 - \alpha }$
E) There is no resource constraint.