How would they accomplish this in service cloud?

A customer service representative for a bank is on the phone with a prospect and wants to promote the next best offer based on digital behaviour.

How would they accomplish this in service cloud?
A . The agent uses a customized next best offer widget powered by the interaction studioconnector
B. Leverage service cloud to inform IS in real-time
C. Use machine learning to serve product/ content recommendations in email sent by your ESP
D. Manually sync data from Interaction studio to service cloud

Answer: A