]It is widely accepted by scientists that chlorofluorocarbons
released into the atmosphere as a result of industrial refrigeration and insulation is the main cause of the huge gaps in the earth’s ozone layer.
(A) released into the atmosphere as a result of industrial refrigeration and insulation is
(B) released into the atmosphere as a result of industrial refrigeration and insulation are
(C) resulting from industrial refrigeration and insulation released into the atmosphere are
(D) being released into the atmosphere as a result of industrial refrigeration and insulation is
(E) having been released into the atmosphere and resulting from industrial refrigeration and insulation are
Error Analysis:Option A: Subject verb error. CFC's plural. So are should be used.
Option B: Correct.
Option C:Misplaced modifier. What is released? CFC's . So it should be placed close to the modifier.
Option D: Same as A . Also usage of being is unnecessarily wordy.
Option E: Simple past should be used. Also usage of and is incorrect as it makes the occurrence of event independent. The causation is broken.
Therefore the answer is B.