Why might plumbing issues be common after the installation of a manufactured home?

The correct choice highlights that manufactured homes often require adjustments during installation, which is a crucial factor contributing to plumbing issues. During the setup process, various components, including plumbing, need to be properly aligned and secured. If these adjustments are not made accurately, it can lead to leaks, blockages, or other plumbing-related problems. This is particularly relevant because manufactured homes may have unique structural elements compared to traditional homes, necessitating careful attention during installation to ensure everything functions correctly.

In contrast, the other options do not accurately reflect the common reasons behind plumbing issues in manufactured homes. While it's true that maintenance can vary, it doesn't specifically address the installation phase, which is critical. Suggesting that manufactured homes come with faulty plumbing systems does not account for the fact that many issues arise from the installation process rather than the quality of the plumbing itself. Lastly, stating that only older homes experience plumbing issues overlooks the reality that newer manufactured homes can also face installation-related challenges that may lead to plumbing complications.