What three supported methods can be used to upgrade a host from ESXi 5.x to ESXi 6.x?

What three supported methods can be used to upgrade a host from ESXi 5.x to ESXi 6.x? (Choose three.)

A.
vSphere Update Manager

B.
vihostupdate

C.
esxcli

D.
vSphere Auto Deploy

E.
esxupdate

Explanation:
Explanation/Reference: