Salesforce Exam Data Architect Topic 1 Question 5 Discussion

Universal container (UC) would like to build a Human resources application on Salesforce to manage employee details, payroll, and hiring efforts. To adequately and store the relevant data, the application will need to leverage 45 custom objects. In addition to this, UC expects roughly 20,00 API calls into Salesfoce from an n-premises application daily.

Which license type should a data architect recommend that best fits these requirements?