Life cycle cost analysis is not directly concerned with environmental impacts. Why might we include this approach in an environmental impact assessment? a. often the benefit to the environment of different approaches must be balanced against the cost of those approaches b. we can generally use cost ($) as a standard functional unit of impact assessments c. finding the breakeven cost is a necessary requirement for all LCAs d. Discounting future values of inventory assessments is a way of measuring impacts that occur in the future