Answer:
D) education of local residents to maintain equipment
Step-by-step explanation:
education of local residents to maintain equipment The time and expense needed to train local residents in servicing the digesters used to convert into clean fuel would be offset by the cost of hiring outside technicians and the benefit of reducing local unemployment, so it isn't likely to have a significant impact on evaluating the proposal. The other factors are significant costs or benefits so it is critical to take them into account.