When cecilia is listening to her partner, she occasionally interjects, "oh, i see" or "uh-huh" during the interaction, cecilia is using backchannel talk?

If this is a true or false question, the answer would be true. Backchannel means describing the behavior of the listeners during a verbal communication. Hope this is the right answer for this question and would be of big help.

should congress have the power to interpret the constitution? write a paragraph in which you argue for or against the wide application of the limplied power

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."