Final answer:
The National Association of Insurance Commissioners (NAIC) is likely the body closest to overseeing the collection of premiums for REIX, as it coordinates state insurance regulatory efforts.
Step-by-step explanation:
The organization responsible for overseeing the collection of premiums for Real Estate Investors Exchange (REIX) is not explicitly named among the options provided. However, given the context of regulation within the insurance sector, the National Association of Insurance Commissioners (NAIC) is the body that brings together state insurance regulators to develop common standards and coordinate their regulatory oversight. While the NAIC itself does not directly regulate REIX, it supports state insurance departments, which in turn have regulatory authority over insurance matters, including the oversight of REIX's premium collections if it falls under their jurisdiction.