What should the admin confirm about the data extension?

A Marketing Cloud admin notices Individual Email Results are NOT being pushed back into Sales Cloud for a particular end. The admin of Marketing Cloud Connect is functioning properly.

What should the admin confirm about the data extension?
A . The wind relationship links SubscriberKey to Subscribers on Email Address
B . The data extension is located in the Synchronized Data Extensions folder.
C . The data extension is located in the Salesforce Data Extensions folder.
D . The triggeredSendDataExtension data extension template was used.

Answer: C