In 1921, J. Bjerknes and his co-authors published what came to be known as the polar front theory. Which one of the following statements is correct regarding this theory?
A) It was shown to be applicable only to winter storms in the Southern Hemisphere.
B) The main features of the theory remain an important part of present-day meteorological thought.
C) The polar front theory was largely incorrect from the very beginning.
D) Although it was useful at the time, it is no longer a useful model.
B
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Fill in the blank(s) with the appropriate word(s).
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