The single most important thing to remember is that there is no one good way to do a talk. The most memorable talks offer something fresh, something no one has seen before. The worst ones are those that feel formulaic. So do not on any account try to emulate every piece of advice I’ve offered here. Take the bulk of it on board, sure. But make the talk your own. You know what’s distinctive about you and your idea. Play to your strengths and give a talk that is truly authentic to you.

1 )"so do not on any account '' can be rephrased as:

A)All in all, for no purpose
B) No matter what
C)However, never
D)Thefore, do not, for any reason.

2) In the passage above "to do a talk" (line 1) can be replaced by:

A) to give a presentation
B) to make a call
C) to write a speech
D) to debate