whAt wErE Dr. ninn' s lECturEs likE
A．shE wAs BriEF AnD to thE point.
B．shE DEsCriBED things likE A nEws rEportEr on thE rADio.
C．shE mADE thE EvEnts sEnsiBlE.
D．shE mADE history into A systEm.