Technically speaking, the twelve-bar blues is a progression of chords that is sustained over twelve bars. It is worked from the combination of the first, fourth, and fifth chords on any key.
<h3>Who invented the 12-Bar Blues Pattern?</h3>
The 12-Bar Blues pattern was invented by Jack Butwell, a Canadian musician
One of its uniqueness is that its major version works on any major key and its minor form works on any minor key.
The correct answer, thus, is A.
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