Consider the Following Production and Cost Schedule for a Firm

Consider the following production and cost schedule for a firm.The first column shows the number of units of a variable factor of production employed by the firm. $$\begin{array} { | c | l | l | c | } \hline \begin{array} { c } \text { Total Number of } \\\text { Units of the Factor }\end{array} & \begin{array} { c } \text { Total Number of } \\\text { Units of Output }\end{array} & \begin{array} { l } \text { Price per Unit } \\\text { of Output }\end{array} & \begin{array} { c } \text { Total Cost } \\\text { of Production }\end{array} \\\hline 2 & 12 & \$ 10 & \$ 50 \\\hline 3 & 20 & \$ 9 & \$ 55 \\\hline 4 & 26 & \$ 8 & \$ 60 \\\hline 5 & 30 & \$ 7 & \$ 65 \\\hline 6 & 32 & \$ 6 & \$ 70 \\\hline 7 & 32 & \$ 5 & \$ 75 \\\hline\end{array}$$ TABLE 13- 3
-Other things being equal,if it becomes more difficult to substitute capital for labour in the production of cell phones,the demand curve for labour in that industry

A) will shift parallel to the left.
B) will become more inelastic.
C) will shift parallel to the right.
D) will remain unchanged.
E) will become more elastic.