Super Crafts is a large arts and crafts store. It is the major purchaser for ColorFull Paints. Recently, Super Crafts told ColorFull that they would have to lower their price to $$1$ per bottle, which is below cost, otherwise Super Crafts would no longer buy their paint. Either way, it will probably result in ColorFull Paints going out of business. Which of the following is true?

a$.$ Super Crafts is in violation of vertical trade restraints.

b$.$ Super Crafts has created a monopoly.

c$.$ Super Crafts has done nothing wrong because it is a buyer, not a seller.

d$.$ ColorFull Paints is in violation of vertical trade restraints