When we choose to talk about something we want to know more about, we _____.

A、notonlyproduceaspeechthatwillturnintoalearningexperiencefortheaudience,butcanalsohelpourselvesstockuponourownknowledgeandexperience;
B、canbeprettysurethatweshallhavethingstosaythatwillbeofnoveltytotheaudience;
C、mayfeelataloss,paralyzedeven,thoughitisquitenatural,aswemightnotyetbeexpertsofthetopic;
D、arewillingtospendtimeonitandthereforecanmakesurethatweenjoytheprocessofpreparingforthespeech