A person who satisfies the standards provided by the body that governs a certain vocation becomes certified or receives certification.
Certification
Certifications seem to be credentials obtained by someone with a person throughout order to validate their authenticity as well as competency to do a job.
Your certification has often been shown as a certificate showing that you have been taught, schooled, and therefore are qualified to accommodate a certain set of standards for particular work as a professional.
Thus the above answer i.e., "Option a" is correct.
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