Which sentence contains a nonrestrictive adjective clause? the lady who lives down the block collects yard ornaments, flags, and anything related to flamingos. a child who chooses the remote rather than a book is making the wrong choice. the sandwich, which had been prepared hours earlier, was soggy and unappetizing. my feet hurt because the shoes that i am wearing are too tight.

There are two types of adjective clauses: Restrictive and Nonrestrictive adjective clause. A nonrestrictive adjective clause consists of words within the sentence that can be omitted, but not changing or affecting the meaning of the sentence. These clauses are usually separated by a pair of commas. On the other hand, restrictive clause is the opposite. 
In the options given, the sentence that contains a nonrestrictive adjective clause is: The sandwich, which had been prepared hours earlier, was soggy and unappetizing.