Final answer:
In the check-in BSA audit, the host must welcome the mobile check in minimally with one of the provided options.
Step-by-step explanation:
In the check-in BSA audit, the host must welcome the mobile check in minimally with:
a) This question is not applicable if the hotel is located in CALA region
b) Thank you for using mobile check in! What do you think about it?
c) We have been expecting you, thank you for using the mobile check in!
d) Are you checking in?, thank you for using mobile check in!