What should a consultant recommend to meet this criteria?

A customer wants to limit the number of emails a subscriber receives to a maximum of one email every 14 days. After the 14-day period, the subscriber is eligible to receive the next message.

What should a consultant recommend to meet this criteria?
A . Import the identified subscribers into a list when creating the send.
B. Create an exclusion data extension populated with the identified subscribers.
C. Query contacts from the Einstein Engagement Frequency data extension when creating the send.
D. Create a suppression list populated with the identified subscribers.

Answer: C

Explanation:

Querying contacts from the Einstein Engagement Frequency data extension when creating the send can be used to limit the number of emails a subscriber receives to a maximum of one email every 14 days. The Einstein Engagement Frequency data extension contains information about how often each subscriber engages with emails and what is their optimal send frequency. By filtering the data extension based on the optimal send frequency, the send can exclude subscribers who have already received an email within the last 14 days.

References: https://help.salesforce.com/s/articleView?id=sf.mc_as_data_view_einstein_engagement_frequency.htm&type=5