What Type of Cost Exhibits the Behaviour That Follows A)Variable Cost

What type of cost exhibits the behaviour that follows? $\begin{array} { | c | c | c | } \hline \begin{array} { c } \text { Manufacturing } \\\text { Volume } \\\text { (Units) }\end{array} & \begin{array} { l } \text { Total } \\\text { Cost }\end{array} & \begin{array} { c } \text { Cost } \\\text { Per Unit }\end{array} \\\hline 50.000 &\$150,000 & \$ 3.00\\\hline 80.000 & 150,000 & 1.88 \\\hline\end{array}$

A) Variable cost.
B) Fixed cost.
C) Curvilinear cost.
D) Step-variable cost.
E) Mixed cost.