What would you advise the customer in this scenario?

A customer has a stack of shelves with both DS4243 shelves and DS4246 shelves. The customer wants to replace the DS4243 shelves with new DS4246 shelves.

What would you advise the customer in this scenario?
A . Convert the ACP communication from out-of-band to In-band channel.
B . Remove the ACP cabling from the stack before adding the new shelves.
C . Remove the DS4243 shelves, but you must add the new DS4246 shelves to a new stack.
D . Configure the shelf IDs of the new DS4246 shelves to match the existing DS4246 shelves.

Answer: C