What is prohibited for licensees when working with unlicensed contractors?

The correct choice identifies a pivotal legal principle regarding the conduct of licensed contractors in relation to unlicensed individuals. Licensees are explicitly prohibited from aiding and abetting unlicensed contractors in evading licensing regulations. This restriction upholds the integrity of the licensing system, ensuring that only qualified professionals engage in construction activities, thereby safeguarding public health, safety, and welfare. By preventing licensed contractors from helping unlicensed individuals bypass legal requirements, the law maintains a level playing field and reinforces the accountability of licensed professionals.

The other options, while related to the conduct of licensed contractors, do not capture the essential legal prohibition as clearly. Offering assistance in obtaining a license may not be inherently illegal but could be ethically questionable depending on the circumstances. Acting as a subcontractor to unlicensed contractors might lead to legal complications or risks but isn't directly a violation. Conducting projects with minimal supervision does not specifically address the relationship between licensed and unlicensed contractors in terms of regulatory compliance. Therefore, option C stands out as the clear answer reflecting a critical legal obligation.