Which statement about electronic programmable logic device image upgrades is true?

Which statement about electronic programmable logic device image upgrades is true?
A . An EPLD upgrade must be performed during an ISSU system or kickstart upgrade.
B . EPLD and ISSU image upgrades are nondisruptive.
C . Whether the module being upgraded is online pr offline only the EPLD images that have different current and new versions are upgraded.
D . You can execute an upgrade or downgrade only from the active supervisor module.

Answer: D

Explanation:

Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/4_0/epld/release/notes/epld_rn.html