Since the store qualifies for an exemption from the federal registration requirement, the firm is not necessarily exempted from a state registration requirement.
This refers to any federal requirement for a business which must be registered in order to ensure its validity, enforceability, admissibility etc of the business.
The convenience stores is not necessarily exempted from a state registration requirement despite that its qualifies for an exemption from the federal registration requirement.
Therefore, the Option B is correct.
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