Read the sentence.
Alma plans to visit London and Paris, where her parents went on their first trip together as a married couple.
What best describes the underlined part of the sentence, and why?
It is a restrictive relative clause because it begins with a relative pronoun, has both a subject and a verb, and is not necessary to the meaning of the sentence.
It is a nonrestrictive relative clause because it begins with a relative pronoun, has both a subject and a verb, and is necessary to the meaning of the sentence.
It is a restrictive relative clause because it begins with a relative pronoun, has both a subject and a verb, and is necessary to the meaning of the sentence.
It is a nonrestrictive relative clause because it begins with a relative pronoun, has both a subject and a verb, and is not necessary to the meaning of the sentence.
It is a nonrestrictive relative clause because it begins with a relative pronoun, has both a subject and a verb, and is necessary to the meaning of the sentence.
The clause "where her parents went on their first trip together as a married couple" provides essential information about the specific locations Alma plans to visit, making it nonrestrictive. If this clause was removed, the meaning of the sentence would be significantly altered.