GMAT Sentence Correction (SC) | Knowledge of the winter behaviour of emperor penguins has

Knowledge of the winter behaviour of emperor penguins has been gained slowly because ofhigh 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 inwinter.

Considering 'of' in the options A and B as typo.

A. high winds, temperatures around minus 60 degrees Fahrenheit,the fact of round-the-clock darkness and frequently sudden blizzards make
Breaks the parallel
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