Which sentence shows why scientists at first thought the whales were fighting each other
for food?
A "Most of the time, they plow through the ocean with their huge mouths open, scooping
up thousands of tiny shrimplike creatures called krill." (paragraph 1)
B "Suddenly, all of the whales explode out of the water at once, right in the middle of the
bubble-circle." (paragraph 2)
C "Whales are known to use bubbles and loud calls when they try to chase away other
whales." (paragraph 5)
D "A single whale swims below the fish, carefully releasing air from its blowhole to create a
wall of bubbles." (paragraph 8)