If a layout handle exists in the “base/default” package, your custom design package, and the...

All of the handles can be merged.

Only the handles in “base/default” can be merged.

Only the handles in your design package can be merged.

Only the handles in “local.xml” can be merged.

Only the handles in “base/default” and “local.xml” can be merged.

Only the handles in your design package and “local.xml” can be merged.