The Table Below Shows the Marginal Benefit and Marginal Cost

The table below shows the marginal benefit and marginal cost of purchasing an additional unit of 3 different public goods. $$\begin{array} { | c | c | c | c | } \hline & \text { Marginal benefit } & \text { Marginal cost } & \begin{array} { c } \text { Total spending on the } \\\text { public good }\end{array} \\\hline \text { Public good 1 } & \$ 20 & \$ 20 & \$ 1,500 \\\hline \text { Public good 2 } & \$ 15 & \$ 25 & \$ 800 \\\hline \text { Public good 3 } & \$ 10 & \$ 5 & \$ 700 \\\hline\end{array}$$

A) public good 2 toward public good 3.
B) public good 3 toward public good 1.
C) public good 2 toward public good 1.
D) public good 1 toward public good 3.