A: a source that’s cited in another source
If the main point is about something that is not funny then it will distract the reader but its about all the same topic it will make it interesting to the reader
1. I am an astronaut because I float in space and look at earth 2.I am a princess because my father has a crown and I have to wear a dress 3.I am a baseball player because I swung with a bat and there is a pitcher 4.I am an artist because I have a canvas and brushes 5.I am a mechanic because I sell parts of things to people
The answer is: Impromptu speeches require lots of research.
When you Impromptu, it means that it was not prepared ahead of time. Usually it requires stock information. Research could not be used in impromptu speeches as it is something that is done without preparation.