You are designing a SharePoint 2010 information architecture plan for a client that specifies the mechanics of
implementing content type change control. The requirements for the change control plan specify that:
Site managers can create site-specific content types based on the content types in the parent site.
.Content types must not be overwritten when changes are made to parent site content types.
.Site managers can change child site content types.
You need to specify a content type change control plan that meets all these requirements.
Which approach should you recommend?

A.
Direct the site manager to explicitly set the read-only property of the content type to true.
Direct the site collection manager to make the specified change required in the child site to the content type at the site collection level.

B.
Direct the site manager to explicitly set the read-only property of the content type to true.
Perform a push-down operation from the parent site to overwrite the required changes to the read-only content types in all the child sites.

C.
Define the content type as read-only at the child site level.
Direct the site manager to explicitly set the readonly property of the content type to false to make changes to the content type.
Then change the read-only property to true.

D.
Define the content type as sealed. Direct the site manager to explicitly set the sealed property of the content type to false to make changes to the content type.
Then change the sealed property of the content type to true.