To hold listener interest during an informative speech is it not a good idea to repeat material during the speech

A very large but biased sample is better than a relatively small, unbiased sample

Indicate whether the statement is true or false

Motion picture viewing apparatus developed by the Edison laboratories in which a single spectator watched a movie through a small viewer. 

A. Zoopraxiscope  B. Kinetoscope  C. Kinetograph  D. Dickson device