Which types of harmony especially intrigued Romantic composers? dissonance
major tonality
chromaticism
common chord progressions

answer; (binary). i believe this is the correct answer;

answer; i believe the correct answer is ( it gives the photographer greater control over the print)

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.  

the style of music that was composed during the classical era was concerto grosso.