27. The word "ensure" in tine 25 is closest in meaning to (A) guarantee (B) decrease (C) convince (D) continue

9. Why does the author mention "block, roller, or screen" in line 25 ? (A) To give examples of textile printing techniques that are based on dyeing (B) To argue that all methods of printing patterns onto textiles involve dyeing (C) To emphasize the variety of special tools used in me process of dyeing textiles (D) To give examples of textile printing techniques mat do not involve dyeing