Question: The endangered Florida manatee is a large, aquatic mammal that feeds on sea grasses in brackish water. Due to where they like to feed, manatees are vulnerable to injuries from boat propellers. If speed zones requiring boats to maintain a low speed are placed in areas where manatees are known to congregate, which will most likely occur?

  Options: 
 A. less water pollution in manatee habitats will occur
 B. manatees will seek alternate food sources
 C. new manatee predators will surface
 D. manatee populations will increase
Answer: D