Substantive $($legislative$)$ rules issued by agencies are:

a$.$ rules that describe an agency's organization, method of operation, and internal practices

b$.$ statements that provide the agency staff and public with guidance regarding what the agency believes a certain statute or regulation means

c$.$ none of the other choices

d$.$ administrative statutes with the same force and effect of law as statutes passed by Congress

e$.$ statements that may only rephrase the language of a statute passed by Congress