A or D are possible ways to check effectiveness of a paragraph
The answer is : IT CREATES A MOOD OF ANXIETY AND UNCERTAINTY
The answer is 'colluded', because it means that they schemed to do it secretly. The other options aren't possible here, and most of them are adjectives, and you need a verb.
<span>A speaker must be aware of nonverbal feedback from the audience in order to adapt the speech as he or she speaks
</span><span>true</span>