Ethan is giving a highly technical presentation on biomedical engineering involving several working models, computerized graphs, and video clips to a small group of doctors, scientists, and engineers. which two characteristics of public speaking should he be most concerned with during his preparation? a. delivery and audience b. noise and delivery c. channel and message d. none of the above.

Probably noise and delivery since he is including video clips.

a. delivery and audience

Explanation:

When you are doing a public speech there are several factor to have in mind in order to deliver your message in the most efficient and understandable possible way. In this case you Ethan would have to have in mind that the delivery is a group of doctors, scientists and engineers, so the audience is capable of understand the higghly technical presentation and he should do it in a professional way.

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explanation:

the anecdote makes readers feel sorry for the man’s lack of heritage, then reminds readers that the man has an equally valuable heritage.