Answer:
The earliest form of musical notation can be found in a cuneiform tablet that was created at Nippur, in Babylonia (today's Iraq), in about 1400 BC. The tablet represents fragmentary instructions for performing music, that the music was composed in harmonies of thirds, and that it was written using a diatonic scale.
I'm pretty sure it was through missionaries being sent around.
The Tyranny is a government is ruled by someone who has seized control, often by illegal means.
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Also, usually if you summarize something, the answer is in the first few or last sentences.