Correctly written sentence:
The proposed methods for controlling pollution were presented (more as temporary remedies than as) permanent solutions to the problem.
Why would this answer choice be wrong?: (as more temporary remedies than)
I don’t like “more temporary.” Putting those words together muddles the meaning of the sentence. They’re not presented as more temporary (i.e. temporarier…not a word but hopefully you get what I’m saying), they’re presented as temporary more than they are presented as permanent.