Final answer:
A commercial property manager is responsible for ensuring that a property complies with building codes and zoning regulations, particularly when working with contractors.
Step-by-step explanation:
The responsibility of a commercial property manager when dealing with contractors is B) Ensuring compliance with building codes and regulations. Commercial property managers are tasked with maintaining the property and ensuring that any changes, renovations, or construction work meet local zoning regulations and building codes to ensure the safety and legality of the property's use. This includes keeping up-to-date with changes in regulations and overseeing contractor work to maintain compliance with governmental restrictions and ordinances related to business and property use.