tinashine20 wrote:
Knowledge of the winter behaviour of emperor penguins has been gained slowly because of high winds, temperatures around minus 60 degrees Fahrenheit,the fact of round-the-clock darkness and frequently sudden blizzards make the Antarctic habitats of the emperors dangerous places for humans in winter.
A. the fact of round-the-clock darkness and frequently sudden blizzards make
B. round-the-clock darkness, with frequently sudden blizzards, make
C. round-the-clock darkness, and frequent sudden blizzards
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