Answer: the correct answer is D The residency requirement is constitutionally permissible because the water board members are elected at large.
Step-by-step explanation:
The Equal Protection Clause prohibits state dilution of the right to vote, so that when a governmental body establishes voting districts for the election of representatives, the number of persons in each district may not vary significantly. This is the principle of "one person, one vote." This principle is used to almost every election where a person is being elected to perform normal governmental functions (e.g., an election for trustees for a junior college district). However, the principle of one person, one vote generally is not applicable where there is an at-large system of election. Here, the water board members are elected by all of the qualified voters in the city in an at-large system, and no discriminatory intent is evident. So, the statutory provision requiring board members to reside in each of the five districts does not come out in an imbalance or a dilution of the voting rights of the citizens of the city.