If a customer files a complaint with the contractor's board, how many days does the board have to inform the contractor of the investigation?

The contractor’s board is required by law to inform the contractor about the complaint and the investigation within a specified timeframe to ensure due process and transparency. The correct timeframe is 10 days from when the complaint is filed. This prompt communication allows the contractor to understand the nature of the complaint and prepare a response accordingly, ensuring that they have the opportunity to address the issue before any further actions are taken by the board.

The other options present longer timeframes that do not align with the regulations guiding the complaint process, which emphasizes timely communication to facilitate resolution and protect both the consumer's and the contractor's rights.