The oldest playable musical instruments were discovered in are thought to be between 7,000 and 9,000 years old.

The oldest known playable musical instrument, a seven-holed flute fashioned 9,000 years ago from the hollow wing bone of a large bird.

i think it is d but idk

based on the images pictured above, the major difference between the two cathedrals: the cathedral of notre dame and the amiens cathedral, is that the cathedral of notre dame emphasizes the horizontal lines while the amiens cathedral emphasizes the vertical lines.