Answer: D. The economy was struggling in much of 2009.
Explanation:
In 2009, the ownership of mp3 players seemed to dip from April to September and only recovered afterwards. 
Laptop computer ownership may not have decreased but stopped growing and remained the same in the same period. Desktop computer decreased in ownership and even Cellphone ownership decreased as well. 
This means that all four gadgets were affected in 2009 in a negative manner which means that the economy struggled in that time period in 2009. 
 
        
             
        
        
        
 magma, rises through cracks and erupts to form volcanoes. The answer id D. Hotspot volcanism would thus be unique because itdoes not occur at the boundaries of Earth's tectonic plates, where other volcanism occurs.
        
                    
             
        
        
        
Answer:
If the frequency of a wave increases while its speed remains constant, the wavelength decreases i.e. the distance between successive crests decreases. 
Explanation:
 
        
             
        
        
        
Answer:
Brainless pls pls pls pls 
Explanation:
 
        
             
        
        
        
True. how is this geography, though?