Suppose Erie Textiles Can Dispose of Its Waste "For Free

Suppose Erie Textiles can dispose of its waste "for free" by dumping it into a nearby river.While the firm benefits from dumping waste into the river,the waste reduces the fish and bird reproduction.This causes damage to local fishermen and bird watchers.At a cost,Erie Textiles can filter out the toxins,in which case local fishermen and bird watchers will not suffer any damage.The relevant gains (in thousands of dollars) and losses for the three parties are listed below. $$\begin{array} { l r c } & \text { With Filter } & \text { Without } \\\text { Gains to Erie } & \$ 200 & \$ 400 \\\text { Fishermen } & \$ 180 & \$ 50 \\\text { Bird Watchers } & \$ 130 & \$ 25\end{array}$$
Refer to the information given above.Local fishermen and bird watchers would be willing to compensate Erie Textiles ______ for operating with a filter.

A) up to $310 thousand dollars
B) no more than $235 thousand dollars
C) no more than $75 thousand dollars
D) nothing