Those who are concerned about the environment question if the timber industry, interested in cost-efficiency, might not be initiating a program that increased productivity but polluted nearby rivers and streams.
A) question if the timber industry, interested in cost-efficiency, might not be initiating
B) question if the timber industry, interested in cost-efficiency, had not initiated
C) question whether the timber industry, interested in cost-efficiency, might not initiate
D) wonder as to whether the timber industry, interested in cost-efficiency, were to initiate
E) wonder whether the timber industry, with its interest in cost efficiency, initiated