In the following question, a part of the sentence is printed in bold. Below are given alternatives to the bold part at (1), (2) and (3) which may improve the sentence. Choose the correct alternative. In case no improvement is needed your answer is (4).
It is a sheer foolishness to think that the education system can be improved by doing away examinations.
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by doing with
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by doing it to
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by doing away with
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No improvement
C.
by doing away with