Final answer:
The document that assists licensees in implementing NRC's regulations is C. regulatory guides, which provide guidance on complying with the regulations to ensure safety standards are met.
Step-by-step explanation:
The document that provides information to licensees about implementing specific parts of the Nuclear Regulatory Commission's (NRC's) regulations is C. regulatory guides. These guides offer guidance to licensees and applicants on how to comply with the regulations and achieve safety standards.
The guides describe techniques that the staff considers acceptable for use in meeting the regulatory requirements. Regulatory guides are not mandatory, but they are highly useful for understanding and applying NRC regulations.