Which three logs can be reviewed to troubleshoot a vCenter Server upgrade failure?

Which three logs can be reviewed to troubleshoot a vCenter Server upgrade failure? (Choose three.)

A.
vminst.log

B.
vim-vcs-msi.log

C.
pkgmgr.log

D.
vc-upgrade.log

E.
firstboot.log

Explanation:
Explanation/Reference: