单项选择题 A new HACMP maintenance level has recently been released. An administrator is creating a  project plan that is required for applying the updates for a three-node production cluster.  To minimize downtime，what is the best way to accomplish the updates on all cluster nodes？（）

单项选择题 While reviewing the HACMP log file， a warning message appears stating that a custom event script could not be found. A check of the current path settings indicates that all required paths are present.  What step can be taken to correct the missing paths issues during cluster event processing？（）

单项选择题 In the past several months， manual intervention has been required to correct improper cluster configuration changes. The administrator received a directive from management to create a more effective strategy for making the changes required fro month-end processing.  How can HACMP be used to meet the requirements of management’s directive？（）