How should the consultant set this up?

Northern Trail Outfitters wants to use Marketing Cloud to send notifications to customers when their orders are ready for in-store pickup. The notifications can be either SMS or email depending on their communications preference.

How should the consultant set this up?
A . Create an Outbound Message in MobileConnect with AMPscript in body to trigger an email confirmation as a fallback.
B. Journey Builder Transactional Send Journey.
C. Automation with a Send SMS and Send Email activity in separate consecutive steps.
D. Journey Builder multi-step journey with an API entry event and a decision split.

Answer: B