Gregorian chart notation did not include which of the following? a- key signatures b- staves c- square shapes d- diamond shapes

It does not have A. Key signatures

It does have staves, it is what it is written on

It does have square shapes and diamond shapes as indicated in the photo

operation overlord was the codename for the battle of normandy, the allied operation that launched the successful invasion of german-occupied western europe during world war ii. the operation was launched on 6 june 1944 with the normandy landings

slavery, abortion, donald trump, gay marriage, racial rights, immigration  

explanation:

anything that has been broth up to the supreme court is something of grate political divide   so just look as court cases