28. The development of an economical artificial heart is only a few transient failures away.
(A) Artificial heart is crucial to economic development though it may fail.
(B) The idiom “failure is the mother to success” does not always apply.
(C) Low-cost artificial heart has to undergo transient failures to succeed.
(D) Affordable artificial heart is soon going to be successfully developed.
(E) Failure to develop artificial heart is due to poor economic situation.
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