Which of the Following Statements Is MOST Accurate Regarding US

Multiple Choice

Which of the following statements is MOST accurate regarding US environmental legislation since 1970?

A) Has been mostly successful -- many endangered species are recovering, soil erosion has declined more than 60%, emissions of six important air pollutants have dropped by more than 25%.
B) Has mainly been a failure - most endangered species have gone extinct, soil erosion has increased 60%, levels of wet sulfate, a major component of acid rain, have increased by 20%.
C) Has been mixed - many endangered species are recovering, much farmland has been conserved, but air pollution and water pollution are worse than in the 1970s.
D) Has had little effect - little land has been conserved, no endangered species have been recovered, and pollution levels have not changed much since the 1970s.