What is the name of the epithelial layer formed by reduced enamel after the crown has erupted?

Explanation

The epithelial layer that forms from reduced enamel following crown eruption is called the primary attachment epithelium. Other options refer to different structures: secondary attachment epithelium forms later, the primary enamel cuticle is a protective layer on enamel, and reduced enamel epithelium is the layer before eruption.