In the Equation $Y = F ( K , L ) = \bar { A } K ^ { 1 / 3 } L ^ { 2 / 3 }$

Multiple Choice

In the equation
$Y = F ( K , L ) = \bar { A } K ^ { 1 / 3 } L ^ { 2 / 3 }$ ,
the "bar" over the A means that it is:

A) a parameter that is endogenous
B) a variable that is fixed but not exogenous
C) a parameter that is variable or exogenous
D) a variable that is endogenous
E) a parameter that is fixed and exogenous