【多选题】
A <{p}>Stateless alerts can be cleared manually<{br/}><{/p}>
B <{p}>Stateless alerts are automatically cleared after one day.<{br/}><{/p}>
C <{p}>Stateful alerts are purged automatically from the alert history after one day<{br/}><{/p}>
D <{p}>Stateless alerts can be purged manually from the alert history.<{br/}><{/p}>
E <{p}>SStateful alerts must be cleared by a DBA to resolve the problem identified in the alert.<{br/}><{/p}>
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