Hello everyone!

I am in the middle of reviewing PT 68 section 1 question 24.

I had a question about the answer choices.

Is answer choice E translating into "If there is a reasonable solution to the problem of overdue water bills in the city -> enact a law that classifies water bills as taxes" or is it the other way around, enacting a law that classifies water bills as taxes as the sufficient condition. I know that "the only" signifies a sufficient condition but sometimes I get confused from time to time and mistake it for necessary condition depending on where the term "the only" appears in the sentence.

Thanks a bunch for your inputs!

Jay bird