Which is one of the four types of certs?

• A. Reference
• B. Quality standard
• C. Auditing
• D. Policies

Answer: (A)

A certificate that serves as a reference is the one you use as an official source of information you can cite when performing tasks. It functions as a dependable pointer to authoritative procedures, specs, or guidance, so you know exactly what to follow in practice. That makes it a distinct certificate type, separate from items that describe standards, processes, or rules. A quality standard is a benchmark you aim to meet, not a certificate you reference; auditing is the verification activity, not a certificate category; policies are rules to govern actions, not certificates. So the reference certificate is the appropriate type because it provides the trusted source you consult for correct procedures and requirements.