O. Henry's uses third-person narration in "After Twenty Years" affects the story as:
- it allows the reader to get to know each character.
O.Henry uses third person narrative to build surprise until the end of the story. Third person narration gives an insight of the story not through any character's perspective rather through a third person. This helps the writer to hold the climax of the story until the end. 
 
        
             
        
        
        
White, tree and flower are a noun. Dogwood would be the predicate adjective.
        
                    
             
        
        
        
Answer:
Explanation:
Thank you for this message! This really made my day even better! Have a good day
 
        
             
        
        
        
Answer:
A. Knowing that the attack might reach us in all too short a time, we
immediately began greatly to increase our industrial strength and
our capacity to meet the demands of modern warfare.
Explanation:
The attack is coming quickly so the logical thing to do is to prepare. The other examples are motivational or pathological statements while the first one (A) uses a clear and methodical string of thought to find a solution for the coming attack.
(If a picture type thing helps you: attack coming soon---what do we do?---begin to prepare for the attack immediately.)