Answer:
C. It uses expert testimony, an explanation of benefits, and a group of facts.
Explanation:
the other answers are all negative impacts of mucas
The correct answer for this question is this one:
"The type of channel do Speaker 1 and Speaker 2 use in their communication is that they are directly receive the content of the message via person-to-person, without any device like telephone, sms, or someone who can deliver it to them personally.
