Read the sentence. the entire first period class agreed that yesterday’s algebra homework which the teacher assigned was a really fun challenge. how should the writer revise the punctuation in the sentence so that it is grammatically correct? insert commas around “yesterday’s algebra homework” because it is a restrictive element. insert a comma after “the entire first period class” because it is a restrictive element. insert commas around “which the teacher assigned” because it is a nonrestrictive element. insert a comma before “a really fun challenge” because it is a nonrestrictive element.