Which std/sti can cause pelvic inflammatory disease (pid)? a. syphilis b. hiv/aids c. chlamydia d. scabies

c

Explanation:

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.  

homophonic or a tonal