Assume That a Purely Competitive Firm Uses Two Resources, Labor

Assume that a purely competitive firm uses two resources, labor (L) and capital (C) , to produce a certain product. In which situation would the firm be maximizing profit? $\begin{array}{|c|c|c|c|c|} \hline & \text { MRPL } & \text { MRPC } & \text { PL } & \text { PC } \\\hline \text { A } & \$ 100 & \$ 200 & \$ 300 & \$ 400 \\\hline \text { B } & \$ 100 & \$ 200 & \$ 200 & \$ 100 \\\hline \text { C } & \$ 150 & \$ 200 & \$ 150 & \$ 200 \\\hline \text { D } & \$ 300 & \$ 400 & \$ 300 & \$ 200\\\hline \end{array}$

A) Case A
B) Case B
C) Case C
D) Case D