![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-53/ti_inject-812ce.png)
The wen-rounded study has shown .
A.
dropouts are substantially below PhDs in financial attainment
B.
the incentive factor is a minor one in regard to pursuing PhD studies
C.
the PhD candidate is likely to change his field of specialization if he drops out
D.
about one-third of PhD candidates do not complete their doctorates