Phrase "the resulting flow pattern" is singular so use of 'are' is incorrect. Option A,B & D are clear out.
Option E is passive & awkward. It also changes the meaning of the sentence by using phrase "formed by rapidly moving air".
By POE, option 'C' is best.
Option E is passive & awkward. It also changes the meaning of the sentence by using phrase "formed by rapidly moving air".
By POE, option 'C' is best.
