Which body investigates initial code of ethics cases?

The correct choice is the Board of Control. This body is responsible for the investigation of initial code of ethics cases within the context of professional golf management.

The Board of Control plays a crucial role in ensuring adherence to ethical standards by reviewing allegations and determining whether any violations have occurred. Their function is critical in maintaining integrity within the profession, as they can assess issues related to professional conduct and decide on appropriate actions or penalties.

In contrast, the other committees have different focuses. The Board of Ethics, while it sounds relevant, typically oversees ethical guidelines rather than investigating specific cases. The Review Committee usually deals with appeals or the evaluation of decisions rather than initial investigations, and the Oversight Committee generally has a broader governance role rather than focusing specifically on ethics cases. Thus, the Board of Control is the appropriate body tasked with these initial investigations.