Zitkala-sa often uses jokes to start her presentations or to keep her audience engaged while presenting to figures. people love her presentations while still retaining the information. what is the truth behinf the jokes zitkala-sa includes in her presentations?

Zitkala-sa uses the empathy in her presentations, this is thinking in the needs of the listeners, by this reason: when a person receive so much information, after a hour or less his mind tired itself and his/her attention be dispersed, the, a joke or another pause in the activity of talking or showing a presentation, allows that their mind rest and return the attention to the presentation.

Explanation:

For a person to learn something, first the speaker must be connected with the listener, to know his/her likes and use them how part of the presentation.  

the answer is either c or d i think its d

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.