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22. Cardiopulmonary resuscitation should begin between one to four minutes after a cardiac arrest in order to be a success.
(A) Cardiopulmonary resuscitation should begin between one to four minutes after a cardiac arrest in order to be a success.
(B) Between one and four minutes after a cardiac arrest, cardiopulmonary resuscitation should begin to be successful.
(C) Successful cardiopulmonary resuscitation should be begun from one to four minutes after a cardiac arrest occurs.
(D) If it is to be successful, a cardiac arrest should be treated with cardiopulmonary resuscitation one to four minutes afterward.
(E) To be successful, cardiopulmonary resuscitation should begin within one to four minutes after a cardiac arrest.

The key is E. 为什么要用主动,而不用被动呢

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