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A
Never
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B
Periodically — commonly every two to three years, though it varies by state and program
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C
Every week
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D
Every ten years only
Why this is the answer
Alcohol server certifications typically must be renewed periodically — commonly every two to three years — though the exact renewal period varies by state and certifying program. Renewal ensures servers stay current with laws and best practices, which can change over time. Servers should track their certification's expiration and complete renewal training before it lapses, since serving without a required valid certification can violate the law or employer policy. Because the period varies, always confirm the renewal requirement for your specific state and certification.
Source: Responsible Beverage Service — Certification Renewal