Acoustic instruments.
Simple chord progressions such as C-F-G or Am-G.
Simple time signatures such as 3/4 or 4/4.
"Sharp" or natural keys such as C, D, E, G or A.
Simple scales such as pentatonic minor (blues), pentatonic major, major, melodic minor and mixolydian.
Depends on which set of two black keys you are referring to
Answer:
C.
Explanation:
when there where many wars it was harder to fight was with wooden weaponry like bows. they found it was easier to fight with guns.
