You have to add the starting code for the OnCreate() method to integrate the AppCenter SDK with the mobile-based applications. 

Which of the following would go into Slot2?

Answer options:

A.System
B.Crashes
C.Runtime
D.Mobile

Answer – B 
Here you need to add the Type of “Crashes”. 
This is given as the starting documentation when you set up a project in Visual Studio App Center. 

Since this is clear from the implementation, all other options are incorrect. 
For more information on getting started with Xamarin, please visit the following URL- 

https://docs.microsoft.com/en-us/appcenter/sdk/getting-started/xamarin