Could you show how D may or may not be true?
Answer choice D:
(D) Some of those who influence the community┬б┬пs values neither are interested in public service nor are selfish opportunists.
'may or may not be' means that though the situation given in D may certainly exist it is not necessary that it HAS TO exist. Meaning even if you negate D
it will not kill the argument, but you cannot negate A
because it is given in the premise itself:
Those who participate in local politics include ... who are selfish opportunists. Everyone who participates in local politics has an influence on the community┬б┬пs values.