IV. Look at the signs. Choose the best answer (A, B, C or D) for each sign (0.5 pt) 17. What does the sign mean? A. Don't litter. C. Can cut tree. B. Don't pick flowers. D. Don't cut down trees. 18. What does the sign mean? A. You can turm left. C. You can turn right. B. You cannot turn left. D. You cannot turn right.