You need to ensure that the default queries work correctly

You are configuring Enterprise Search for Microsoft Dynamics AX 2012. You need to ensure that the
default queries work correctly. What should you do?

A.
Update the search service URL.

B.
Set the Search Crawler role to read-only.

C.
In the Queries node of the Application Object Tree (AOT), set the searchable property to True.

D.
In the Microsoft SharePoint Business Data Connectivity (BDC) service, set the searchable property
to True.