Pauline: Some environmentalists claim that for the salmon to be saved, the hydroelectric dams on the river must be breached. But if the dams are breached, given the region' s growing population and booming industry, electrical costs will skyrocket. Roger: The dams are already producing electricity at optimal capacity. So regardless of whether they are breached, we will have to find additional energy sources for the region. The dialogue provides the most support for the claim that Pauline and Roger agree that ['there will be no significant decrease in demand for electricity in the region in the near future', 'if the dams remain in service but do not operate at optimal capacity, electrical costs in the region will rise', 'finding additional energy sources will not decrease the electrical costs in the region', 'some environmentalists who advocate saving the salmon believe that that goal overrides concerns about electrical costs']