Answer: B) The impact of the Greek Empire founded by Alexander the Great
Explanation:
 
        
                    
             
        
        
        
Manual focus might or might not be important. Very few subjects give you time to photograph them. 
Anticipation is a good answer. Mosts sports photos are taken because the cameraman/woman is either a good editor or he/she understands the game well enough to know what will happen.
I don't know that people have to know who you are especially if you are taking pictures of animals or vegetation. 
I have enough doubt that you can't pick the last one. So B.
        
             
        
        
        
The aspect of of instruments that improved during the Romantic period was the valves. The correct answer is D, valves. 
        
                    
             
        
        
        
Ragtime is usually defined as a song that is in 2/4 time or 4/4 time people usually get it confused with 3/4 time however that is considered a ragtime waltz. Ragtime is used by taking the base line and using progressive harmonic chords that may be punch or silent while the melody is carried out through the Alto,Soprano lines as it uses syncopation which makes the song being played off beat and unexpected. It's related to jazz by the fact that Jazz itself rather replaced Ragtime due to the rising amount of bands that added a unique style to the ragtime with a 70+ BPM and usually included it in many records. 
        
                    
             
        
        
        
He studied architecture,mechanics, cosmology, anatomy and geology