The problem is not (i)____________ by water quality standards, because differences in use of water may make it hard for users to agree on standards. This (ii)____________ the possibility of costly dissipation of resources as groups compete to set the water quality standards (iii)____________. A. exacerbated B. opens the door to C. functionally D. eschewed E. dramatically decreases F. detrimental G. simplified H. proves futile to I. advantageously