The answer would be | B | hope this helps ;)
A. this letter is to make you cognizant of our rdceipt of your order
Answer:
The caption would be the the detective spied on the suspects.
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.
