Forensic scientists use science to find evidence at a crime scene. Which of the following shows how forensic scientists use observation to gain knowledge about the time of a crime? A. They see that insects can hide and even destroy evidence at crime scenes. B. They see that insects interact with dead bodies. C. They see that the presence of young from different species of flies shows time of death. D. They see that insects are often the first living things to disturb a crime scene.