If im correct it would  be A .
        
             
        
        
        
Rock and roll is a style of popular music that originated from the U.S in the mid-1950s, and by mid-1960s it had developed to an international style known as rock music, though the latter continued to be, rock and roll or rock 'n' roll or rock & roll. The music is associated with performers like Little Richard, Chuck Berry, Buddy Holly and the early Beatles. Instrumentation and arrangements are simple: three or four instruments, and, mostly the same number of cords while horns and strings and back up singers can be added.
        
             
        
        
        
Answer:
Encaustic painting
Explanation:
Encaustic painting, or encaustic, is a pictorial technique in which a molten mixture of wax and resin is applied to a rigid support. It does not smell, takes a few minutes to dry, and completely hardens in a few weeks. 
This wax mixture, called a medium, has optical and chemical properties similar to those of varnishes, giving exceptional brightness and color saturation.
 
        
             
        
        
        
Answer:
Lillian Gish, under D. W. Griffith's gudience
 
        
                    
             
        
        
        
Answer:
Glass is the most common material used to construct lens elements, due to its good optical properties and resistance to scratching. Other materials are also used, such as quartz glass, fluorite, plastics like acrylic (Plexiglass), and even germanium and meteoritic glass.