Improve the bracketed part of the sentence. Higher crude oil prices have doubtlessly provided a significant fiscal boost in the past several months, although any (flair on) going forward can lead to a price spiral that would have other untoward consequences as well.
In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement".
People from all walks of life (to enjoy) the rather popular spot.