Developing Solutions for Microsoft Azure AZ-204 — Question 222

You are developing a Microsoft Entra ID integrated app that interacts with Microsoft Graph. You must allow GET operations to receive unknown members that might be defined in the future in Microsoft Graph API. You plan to include support for evolvable enumerations in the app. You need to specify the HTTP request header that will provide the evolvable enumerations support in the app. Which header should you specify?