Answer:
To help control the disease, letters were cleaned with vinegar before being sent. This did not work, because it was a false cause-and-effect relationship.Explanation:
The symbolic meaning suggested in the "Hunt of the Unicorn" series of tapestries is the Annunciation.
The "Hunt of the Unicorn" is a very famous series of seven tapestries from the period of 1495-1505. The theme of the tapestries involves a group of noblemen and hunters who are chasing a unicorn. There has been a lot of debate around the meaning of the paintings and many believe that it is an allegorical representation of the Christian celebration of the Annunciation, where the Angel Gabriel announced to the Virgin Mary that she would conceive and become the mother of Jesus.
It most likely means they are singing higher than required
If you're asking who, then there are several answers.
Maya Angelou, Joan Baez, Harry Belafonte, Bob Dylan, Mahalia Jackson, Pete Seeger, Otetta Holmes, etc.