Questions 1 through 3 are based on the following instructions. (     )1. A. footprints.                                   B. Food. C. Living insects.                             D. Orange seeds. (     )2. A. Don't touch animals under any circumstances. B. Don't take away any natural objects from the park. C. Don't leave litter in the park or throw any off the boat. D. Don't transport animals from one island to another. (     )3. A. To protect the guide's interest.      B. To improve the unique environment. C. To ensure a trouble-free visit.       D. To get rid of illegal behaviours.