Scenario: An administrator needs to add memory modules to all hosts in a pool. The pool consists of three XenServer hosts with high availability enabled. High availability is able to tolerate one host failure. Which action must the administrator take to ensure that another host will be assigned as pool master before the current pool master memory is upgraded?
A. Disable multipathing.
B. Put the XenServer host into maintenance mode.
C. Run the xe host-emergency-ha-disable command.
D. Run the xe pool-emergency-transition-to-master command.
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