You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.

[Q]: Which is the best evidence for the theory of continental drift?
(A) the appearance of volcanoes at the boundaries where plates collide (B) earthquakes at boundaries where one plate slides past another (C) cases where a species exists in only one isolated place (D) fossils of the same species found on widely separated continents
[A]: D

[Q]: Ella waves good-bye from the bus. What body system pulls on bones to let Ella wave her arm?
(A) muscular system (B) nervous system (C) digestive system (D) circulatory system
[A]: A

[Q]: 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?
(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
[A]:
D