Which of the Following Is NOT True About Federal Rulemaking

Which of the following is NOT true about federal rulemaking?

A) When engaging in formal rulemaking,agencies must hold an adversary hearing.
B) Administrative regulations are not legally binding unless they are published.
C) Agencies can affect future conduct more directly by announcing rules that apply to all who come within the agency's regulations.
D) The acts creating most of the federal agencies expressly grant them authority to engage in rulemaking.
E) Agencies are legally required to air debate over proposed rules,though they often do not do so.