Which two types of API calls are counted against the rolling 24-hour limit?

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 . SOAP API Calls updating objects
B. CreateSalesforceObject() AMPscript
C. Login Calls
D. Bulk API

Answer: C,D

Explanation:

Login calls count as one API call for each login request, and Bulk API calls count as one API call for each batch of records processed. All API calls made by both Marketing Cloud Connect and the Marketing Cloud APIs are counted against this limit. For example, when a user logs in to the Marketing Cloud, this will count as one API call. Additionally, when a Bulk API job is created, this will count as one API call per batch of records processed.