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

A、not only produce a speech that will turn into a learning experience for the audience, but can also help ourselves stock up on our own knowledge and experience;
B、

can be pretty sure that we shall have things to say that will be of novelty to the audience;
C、may feel at a loss, paralyzed even, though it is quite natural, as we might not yet be experts of the topic;
D、are willing to spend time on it and therefore can make sure that we enjoy the process of preparing for the speech