What is the first step required to send using the API?

Northern Trails Outfitters (NTO) developers want to use the Transactional Messaging API to send email receipts to customers.

What is the first step required to send using the API?
A . POST to /messaging/vl/email/messages/ with clientjd
B. Request a token using the vl/requestToken endpoint
C. Request a token using the v2/authorize endpoint
D. POST to /messaging/vl with clientjd and client_secret

View Answer

Answer: B