The Florida manatee used to be endangered and is now protected. This protection has allowed its population to begin recovering. How were environmental scientists able to help the manatee population grow?
A. They determined that high pollution was poisoning the manatees and communicated with the government to have the manatees moved to another state.
B. They increased water turbidity so the manatees’ food supply would increase.
C. They cleared the water of many plant species to make it easier for the manatees to swim.
D. They determined that high turbidity prevented manatees’ food from growing adequately and asked the government to control the cause of increased turbidity.