Northern Trail Outfitters received an email about reaching API limits within Salesforce and they think this is caused by the integrated Marketing Cloud account.
Which two types of API calls are counted against the rolling 24-hour limit?

A B2B customer notices they have a large number of subscribers marked as 'Held'. During troubleshooting, they realize these were soft bounces from overwhelming the email servers of many of the small companies with which they do business.
What step(s) should the customer take to move those subscribers back to 'Active'?

Northern Trail Outfitters recently upgraded their preference center to allow customers to indicate which products they are interested in and to have the ability to opt up and down in send volume. They would like to configure the Delivery Options in a Journey Builder Email Activity to take these new data points into account.
Which two options could allow them to meet the requirement?
Choose 2 answers

A customer is interested in designing a solution to ensure that subscribers only receive categories of emails that they want to receive. The built-in subscription center will be used as part of the solution.
Which feature should be utilised to make this happen?

Northern Trail Outfitters maintains their primary customer identity in their ERP system but managers their customer service via Service Cloud. Customer data is updated in real-time based on changes in the ERP, and the ERP customer ID serves as the Customer Key. They want to leverage Synchronized Data Extensions to import data about cases from Service Cloud every 15 minutes.
What consideration should be made before implementing this solution?