Directions: The following sentences or parts thereof may have an error of grammar or syntax. Select the sentence(s)/part(s) thereof having the error.

(A) Workmen were allowed into prison to repair some damaged cells. (B) Only those schemes can succeed which promise to deliver the goods. (C) Art must be the faithful expression of a society, (D) since it is an undeniable witnesses of its spirit and manners for future generations.