When upgrading a Cisco ASR 1001 Router, when is the request platform software package expand file bootflash:image-name command required?

When upgrading a Cisco ASR 1001 Router, when is the request platform software package expand file bootflash:image-name command required?
A. to copy the consolidated Cisco IOS XE image to the bootflash:
B. to perform Cisco IOS ISSU on the standby route processor Real 26
Cisco 640-878 Exam
C. to run the router using a consolidated package
D. to run the router using individual subpackages