You are moving a customized SharePoint site collection to a new farm. You attach and mount the source
content database in the destination farm.
You need to ensure that all customizations from the source farm are available in the destination farm.
What should you do?

A.
Copy all search indexes from the source farm to the destination farm.

B.
Configure alternate access mappings on the source server.

C.
Copy all custom master pages from the source site collection to the Style Library in the destination site
collection.

D.
Copy all custom site definitions from the file system of the source farm to the destination farm.

Explanation:
=Q42,Q50,Q52,Q59
Note:
* SharePoint Server 2013 customers can create their own site definitions that customize and extend standard
SharePoint site templates.* To create a custom site definition with one or more custom site definition configurations on front- end servers,
you must create a copy of an existing site definition directory.
* For backup/restore and migration operations, you must restore your site to a server that has the same frontend customizations as the server from which you backed up or migrated.
Guidelines for Using Custom Site Definitions, Configurations, and Templates