Final answer:
The correct answer to the question about the 2013 challenge to the Voting Rights Act is A) Alabama, as Shelby County, Alabama, was the plaintiff in Shelby County v. Holder.
Step-by-step explanation:
The case in question is Shelby County v. Holder (2013), so the correct answer to the question, "Regarding the Voting Rights Act in 2013, it was Shelby County of this state vs. Holder", is A) Alabama. Shelby County, Alabama, challenged the constitutionality of the Voting Rights Act's preclearance list, which required certain states to obtain federal approval before making changes to their voting laws. The Supreme Court ruled in a 5-4 decision that the preclearance provisions were based on an outdated formula and therefore unconstitutional, leading to significant changes in voting laws across various states.