How should the Business Practitioner modify the workflow diagram?

The entire list of recipients for a campaign is unavailable at the start of an A/B test. The final list of the recipients will be placed in the final Recipients folder but they will be loaded by the time the A/B test is complete. To start the A/B test, a list of exclusive recipients is used for the initial deliveries in the folder testRecipients.

How should the Business Practitioner modify the workflow diagram?
A . modify the existing query to query all recipients in folders ‘testRecipients’ and ‘finalRecipients’
B. modify the original query to all recipients in ‘testRecipients’ and modify the split activity to query the folder ‘finalRecipients’ in the complement
C. add the enrichment after the wait to add all recipients in the ‘finalRecipients’ folder to the complement from the split activity
D. modify the original query to all recipients in ‘testRecipients’: change the A & B branches to 50% each, and add a new query after the wait to get all recipients in the ‘finalRecipients’ folder

Answer: B