正解:B
By default, Nutanix Prism Central retains the last 10 instances of a report if no retention policy is configured.
* Option B (10) is correct:
* Nutanixstores up to 10 reports, after which older reports areautomatically deleted.
* Options A (5), C (15), and D (20) are incorrect:
* Whileretention policies can be customized, thedefault setting is 10 reports.
References:
* Nutanix Prism Central Guide #Report Generation and Retention Policies
* Nutanix KB #How Reports Are Stored and Managed in Prism Central