The sentence requires that a noun be placed after the modifier, appropriate. A good option that could fill this blank is; 
Therefore, the sentence can be filled thus;
- His advisor suggests that he should have considered a more appropriate  <u>channel</u> for his request.
In the communication model, the channel is the medium through which the message is passed. 
Emails, phone calls, text messages, letter writing, etc., are all channels through which a message can be passed. In the sentence provided, the channel was text message. 
This channel is not quite appropriate for official purposes. Letter writing or email would have been better channels to be used by Claudius.
Learn more here:
brainly.com/question/23715292
 
        
             
        
        
        
Answer:
A citizen's radio broke and they need a new one.
Someone's daughter needs a violin because she is in the school orchestra.
A person needs a new bike to get to work because their old one was stolen.
Someone's new apartment is small and they want to give away some books.
Someone's laptop is broken and they need a new one.
A parent's children are grown up and she wants to give away their toys.
Someone's children are starting school and need two backpacks.
 
        
                    
             
        
        
        
Answer:
Jimmy Cross blames himself for Kiowa's death because he followed orers and made camp in the field, even though it went against his instincts, which were to head for higher ground.
Explanation:
 
        
             
        
        
        
Answer:
B.
Explanation:
If I remember correctly I've taken this test before on edge.