What advance in printing was roger fenton responsible for and how did he accomplish it?

i think it saint james in santiago de compostela

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.  

correct answer is b "write as much as you can about the subject so you might earn extra-credit points"