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 outD. ABout onE-thirD oF thosE who stArt ph.D. work Do not ComplEtE thE work to EArn thE DEgrEE