You want to upgrade the stack’s IOS. Assuming you have all the same model of switches in the stack, what needs to be done?

A. Only the master switch needs to be upgraded.
B. Each switch needs to be upgraded independently.
C. Each switch in the stack needs to be configured with a TFTP location to boot from, and then they all must be reloaded.
D. The IOS image cannot be changed once a stack is configured.

A. Only the master switch needs to be upgraded. Once the master switch is upgraded, it will download the IOS to all other members of the switch stack.