Refer to the screen shot below:

Given a site called RefArch that has the settings shown, what must be done for RefArch to use the same customer list as RefArchGlobal?

The following code ensures that an address ID CANNOT be used if it is already in use by another address in the customer's address book. There is a problem with the code. The error message for an invalid address ID is never shown to the user on the form field.

How should the Digital Developer resolve this issue so that the error message is displayed on the address ID form field?

A client has two B2C Commerce sites in the same instance: one for the U.S market, the other for the European market. The products they make are sold with different safety certificates based-on the world location.
For example, they sell a smartphone with certificate A in the U.S and certificate B in Europe, a hairdryer with certificate C in the U.S and certificate D in Europe, and more.
How should a developer allow the merchant to display the appropriate certification logo in the produce to details page, depending on the customer's location?

A client has two B2C Commerce sites in the same instance: one for the U.S market, the other for the European market. The products they make are sold with different safety certificates based-on the world location.
For example, they sell a smartphone with certificate A in the U.S and certificate B in Europe, a hairdryer with certificate C in the U.S and certificate D in Europe, and more.
How should a developer allow the merchant to display the appropriate certification logo in the produce to details page, depending on the customer's location?

A retailer notices that the Account Addresses page is showing the wrong shopper's address.
Which tool should the developer start with to identify the issue?