Red is the adjective because it describes the color of the truck.
        
                    
             
        
        
        
It seems to me that both A and C are true. 
 B is false. You really can't assume that your audience knows what text you are writing about.
        
                    
             
        
        
        
Answer:
Which statement best describes the effect of word choice on the tone of the excerpt?
A. Words like "violence" and "bloodshed" give the excerpt a threatening tone.
B.Words like "accounts" and "travel" give the excerpt an exciting tone.
C. Words like "again" and "along" give the excerpt an anticipatory tone.
D. Words like "committed" and "deeds" give the excerpt a sinister tone.
Explanation:
The statement that best describes the effects of word choice on the tone is letter A. The words like violence and bloodshed give the excerpt a threatening tone, for both words refers to negative tone that suggest harm or conflict. Therefore, right choice of words are essential to relay the tone of a subject matter of a literary work.