A preconstruction meeting is generally conducted by:

The correct answer is that a preconstruction meeting is generally conducted by the Registered Design Professional (RDP). The RDP plays a critical role in the construction process, as they are responsible for ensuring that the design is properly implemented and all relevant codes and standards are adhered to during construction.

The meeting typically serves several purposes, including clarifying the project scope, reviewing the construction schedule, discussing roles and responsibilities, and addressing any concerns among the project team members. By conducting the meeting, the RDP facilitates communication and collaboration among all parties involved, setting a solid foundation for the project's success.

The other choices, while they may have involvement in the preconstruction phase, do not primarily conduct the meeting. The contractor may participate in the meeting to provide input on logistics and scheduling, but the responsibility for leading it typically rests with the RDP. The special inspection agency and the owner also have important roles, but they do not usually lead these meetings, making the RDP the most appropriate choice.