A. There are no Elkinsville Environmental Society members among the city's politicians.
B. Politicians in Elkinsville will win their efforts to approve the northern expansion of the interstate highway.
C. The Elkinsville Ecological Society will continue to oppose the northern expansion of the interstate.
D. A detailed environmental study of the northern expansion of the interstate has been conducted by the Elkinsville Ecological Society.
The statement that can be supported by evidence from the passage is that "The Elkinsville Ecological Society will continue to oppose the northern expansion of the interstate." This can be inferred from the passage's focus on the Chair of the Elkinsville Ecological Society addressing the society's concerns about the environmental impact of the proposed highway expansion and the assertion that the proposed plan is not the least environmentally damaging option.
Therefore, the Correct Answer is C.