Which of the following is a feature of PVC post and rails?

The selected answer is accurate because PVC post and rails are renowned for their low maintenance requirements. Unlike materials such as wood, which may require regular painting, sealing, or treatment to prevent decay and insect damage, PVC is resistant to rotting, corrosion, and insect infestations. This durability means that once a PVC fencing system is installed, it typically requires minimal upkeep over time, making it an attractive option for those looking for a cost-effective and convenient solution.

In contrast, the other options highlight characteristics that are not associated with PVC. Extensive maintenance would imply that the material deteriorates quickly and requires frequent repairs or replacements, which is not the case with PVC. Additionally, PVC is generally considered cost-effective in the long run because of its durability and low maintenance needs. Lastly, while some materials may indeed be prone to weather damage, PVC is specifically designed to withstand various weather conditions without significant degradation, further cementing its status as a low-maintenance option.