The Tables Above Show a Nation's Labor Demand and Labor

$\begin{array}{l}\begin{array} { c c c } \hline & \begin{array} { c } \text { Quantity of labor } \\\text { demanded }\end{array} & \begin{array} { c } \text { Quantity of labor } \\\text { supplied }\end{array} \\\begin{array} { c } \text { Real wage rate } \\\text { (2005 dollars) }\end{array} & \begin{array} { c } \text { billions of hours } \\\text { per year) }\end{array} & \begin{array} { c } \text { (billions of hours } \\\text { per year) }\end{array} \\\hline 50 & 80 & 100 \\40 & 90 & 90 \\30 & 100 & 80 \\20 & 110 & 70 \\10 & 120 & 60 \\\hline\end{array}&\begin{array} { c c } \hline \begin{array} { c } \text { Employment } \\\text { (billions } \\\text { of hours } \\\text { per year) }\end{array} & \begin{array} { c } \text { Real GDP } \\\text { (billions of } \\\text { 2005 dollars) }\end{array} \\\hline 60 & 2.0 \\70 & 3.0 \\80 & 3.7 \\90 & 4.2 \\110 & 4.5 \\\hline\end{array}\end{array}$
The tables above show a nation's labor demand and labor supply schedules and its production function.
-The equilibrium real wage rate is_{-------------} and the equilibrium quantity of labor is
_{-------------}Billion hours per year.

A) $30; 80
B) $50; 100
C) $40; 80
D) $20; 110
E) $40; 90