When was the Pianola invented?

1.   ?    1866
2.   ?    1876
3.   ?    1886
4.   ?    1896

How many keys does a piano have after 1908?

1.   ?    58
2.   ?    65
3.   ?    85
4.   ?    88

Who introduced the piano "Apollo"?

1.   ?    Melville Clark
2.   ?    Edwin Votey
3.   ?    Hupfeld
4.   ?    Aeolian Corporation