5.In Diersville the new Environmental Action party won two seats on the seven-member town council in 1988.It lost both of those seats in the 1992 election,even though the party's pro-environment platform had essentially remained unchanged.This decline in the party's fortunes clearly demonstrates that in Diersville environmental concerns faded in significance between 1988 and 1992.
Which of the following, if true, most seriously weakens the argument?
(A) Between 1988 and 1992, the number of eligible voters in Diersville rose, but not the percentage who actually voted.
(B) Between 1988 and 1992, Diersville's leading political party revised its platform, adopting a strongly environmentalist stance.
(C) The parties that ran candidates in the 1992 election in Diersville were the same as those that had done so in the 1988 election.
(D) In 1992 the Environmental Action party won fewer votes in Diersville than it had won in 1988.
(E) Between 1988 and 1992, some measures intended to benefit the environment had been adopted by the town council, but with inconclusive results.