Which API should you use?

You are building a Microsoft Outlook Web Add-in.

You need to persist user preferences between devices by using the minimum amount of development effort.

Which API should you use?
A . the Microsoft Graph API
B. the REST API for the Blob service
C. the JavaScript API for Microsoft Office
D. the Table service REST API

Answer: C

Explanation:

You can persist add-in state and settings with the JavaScript API for Office. The JavaScript API for Office provides the Settings, RoamingSettings, and CustomProperties objects for saving add-in state across sessions

Reference: https://docs.microsoft.com/en-us/office/dev/add-ins/develop/persisting-add-in-state-and-settings