【单选题】Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passa...
A.
To question the notion that humans are the most intelligent of animals
B.
To introduce the discussion of intelligence that follows
C.
To explain why dolphins, killer whales, and pilot whales can learn tricks
D.
To emphasize the ways that dolphins can help the military