GMAT Sentence Correction (SC) | Re: Building large new hospitals in the bistate area would

This is a typical subjunctive mood question.

The subjunctive mood is when you have a sentence that refers to an opinion, a wish, etc. Something to the contrary.

If you read a sentence and you get a feel for the subjunctive mood, always match an IF with a WOULD. Also if you see a were/if/would, boom, that's your answer. Classic subjunctive mood.

eg.

Iwould most definitely buy a Ferrari Enzo,if Iwere to accumulate enough cash.