When are redistricting activities typically conducted?

Redistricting activities are typically conducted after a census or a significant population change because these events provide the necessary demographic data that states use to redraw district lines. The U.S. Constitution mandates that a census be conducted every ten years, which serves as the primary trigger for redistricting. This process ensures that legislative districts are adjusted to reflect shifts in population, thereby maintaining equal representation in legislative bodies. As populations grow, decline, or shift geographically, redistricting allows for districts to be reconfigured to ensure that each district has approximately the same number of constituents.

In contrast, redistricting does not happen after every election cycle or on a fixed schedule such as every two years. Additionally, it is not limited to presidential election years. Instead, the timing of redistricting is closely linked to the census, making option B the accurate choice. This practice is crucial for maintaining a representative democracy, as it helps to ensure that each citizen's vote carries equal weight in the legislative process.