An administrator adds an ESXi 5.x host to the inventory of a vCenter Server that is
configured with a vSphere Distributed Switch. The vSphere Web Client indicates that the
host is not responding. The administrator determines from the command line that the vpxa
agent is stopped. What should the administrator do to resolve this issue without affecting
the uptime of the virtual machines running on the host?

A.
Restart the management agents in the host’s DCUI

B.
Type /etc/vmware/vpxa start from the ESXi command line

C.
Remove and re-add the host to the vCenter inventory

D.
Restart the vCenter Server service