Which event occurred first?

Answer

B. First book is printed

Explanation:

First Protestant Hymnal was published in 1532

First opera performance was 1598

First book was printed in 1455

First violin was made in the 1530s

including the octave, the answer would 8 notes in a major scale with one note being played twice. ex) c major scale includes: c, d, e, f, g, a, b, c

notice that c is played twice

however, if you were to ask me how many different notes are in a major scale- the answer would be 7.  

answeras live actors preforming in the same room as a live audience;