Answer:
A. I did it on USATP and got it correct. They said:
Step-by-step explanation:
In order to find the most appropriate replacement, the substituted clause must fit with the remainder of the sentence (…public districts organized under the state irrigation law;) Only one works smoothly: The Wright Act enabled twenty-two areas of land to be designated irrigation districts, public districts organized under the state irrigation law. All other replacements seem awkward.