which word signals a nonrestrictive clause in a complex sentence?\nthat\nwhich\nwhile\nyet

which word signals a nonrestrictive clause in a complex sentence?\nthat\nwhich\nwhile\nyet
Answer
Brief Explanations:
In English grammar, 'which' is used to introduce non - restrictive clauses in complex sentences. Non - restrictive clauses add extra, non - essential information. 'That' is used for restrictive clauses. 'While' and 'yet' are not used to signal non - restrictive clauses.
Answer:
B. which