A cloud service provider's FedRAMP-authorized system has an approved POA&M. During continuous monitoring, the provider discovers that a High-severity vulnerability remediation will miss its scheduled completion date by 45 days because a vendor patch is delayed. Which action BEST aligns with a compliance program that is operating as designed?
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A
Close the POA&M item and open an accepted-risk entry without notifying the authorizing official, since the delay is vendor-caused
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B
Update the POA&M with a revised completion date, milestone changes, and justification, and report the deviation to the authorizing official, with compensating controls documented
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C
Leave the original date in place so audit trails are not altered, and note the delay only in the next annual assessment
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D
Reclassify the vulnerability as Moderate because no patch is currently available, which removes the deadline