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A.Dropouts are substantially below Ph. D. s in financia……

Research has shown that ______.

A.Dropouts are substantially below Ph. D. s in financial attainment
B.the incentive factor is a minor one in regard to pursuing Ph. D. studies
C.the Ph. D. candidate is likely to change his field of specialization if he drops out
D.about one-third of those who start Ph. D. work do not complete the work to earn the degree