Gregorian Chant .
That a person who created the songbook.
Because the it did not agree with the union ideas so they said you have to change all of them if you want us to add your rules to the laws of the United States of America
<span>Think of the three Primaries as the Parents in the family of colors. In paint pigments, pure Yellow, pure Red, and pure Blue are the only hues that cannot be created by mixing any other colors. </span>
I think that true is the right answer
