The Knight blushing under his visor tries to ignore the jurors from the spectators

The participialphrase blushing under his visor set off with commas because it is

A. Essential
B. Nonessential
C. Introductory
D. Nonintroductory

Respuesta :

The answer is it is nonessential.
B. Nonessential. Commas are used to set off nonessential (or nonrestrictive) subordinate clauses in sentences. These clauses are not necessary to the basic meaning of the sentence. The nonessential subordinate clause could be omitted from the sentence without changing the meaning of the sentence.