The advent of decentralized wastewater treatment systems (DEWATs) has reduced the marginal cost of abatement of pollution from such facilities. The level of optimal pollution abatement will

A) increase.
B) decrease.
C) remain unaffected.
D) first reduce and then increase.
E) first increase and then reduce.

99 points which of the following selections is least useful for supporting the claim that states intentionally built unequal school systems to separate the races? question 1 options: a. the supreme court ruling in plessy v. ferguson (1896) declared segregation of schools to be unconstitutional. b. it was very clear by the mid-1900s that southern states had expertly built separate educational systems. these schools, however, were never equal. c. states with laws keeping schools segregated never gave equal amounts of money t o their black and white schools. d. ten years after brown, fewer than 10 percent of southern public schools had integrated. some areas did not comply at all.