Identify the Letter of the Choice That Best Matches the Phrase

Identify the letter of the choice that best matches the phrase or definition.
-String data type for a text string in which blank spaces are replaced with a single blank space and opening and closing spaces are removed

A) schema
B) instance document
C) complex type
D) xs:NCName
E) xs:ENTITY
F) compositor
G) primitive
H) facet
I) xs:token
J) xs:NMTOKEN