thE tExt inDiCAtEs thAt lEADErship rEsEArCh ______.
A．hAs BEEn A ControvErsiAl stuDy For yEArs
B．prEDiCts how A lEADEr ComEs to BE
C．DEFinEs thE likElihooD to BE A lEADEr
D．proBEs thE mystEriEs oF lEADErship