A、BECAusE proFEssor rivErs is intErEstED in womEn’’s stuDiEs.
B、BECAusE proFEssor rivErs is FonD oF proFEssorAnDErson.
C．BECAusE proFEssor rivErs knows littlE in this ArE
A、
D．BECAusE proFEssor rivErs hAs A lot oF spArE timE.