The Internet Has Made Learning to Play a Musical Instrument

The Internet has made learning to play a musical instrument easier than ever, with thousands of Web sites offering free music lessons. What happens in the musical instruments market as a result of the availability of these free lessons?

A) The supply curve increases, pushing down the price.
B) The demand curve shifts out, pushing up the price.
C) The demand curve shifts out, which in turn causes the supply curve to increase. The overall effect on price is ambiguous.
D) The price of musical instruments falls, causing an increase in the quantity demanded.