If Two Firms Pollute, and the Increase in Costs to Firm

Multiple Choice

If two firms pollute, and the increase in costs to Firm A from decreasing pollution is equal to the decrease in costs to Firm B from increasing pollution

A) the firms cannot benefit from trading the right to pollute.
B) the firms can benefit by trading the right to pollute.
C) while both firms can benefit from trading, there is no way for them to determine an agreeable price.
D) both firms will stop polluting.