The following scenario will be used for the next three questions:

Andre offered to sell to Brianna a personal watercraft that was not running very well for $$500.$ Brianna was interested but not willing to pay $$500.$ She said, "I'll give you $$400."$ Andre said that he would think about it$.$ Later, the same day, Andre asked Charlotte if she would be interested in purchasing the personal watercraft for $$500.$ Charlotte said, "Would you consider $$450?"$ Andre said he would think on it$.$ A few minutes later, Dylan who had heard that Andre wanted to sell the watercraft accepted Andre$$s offer to sell for $$500,$ and they agreed that he would pick up the watercraft the next day. A few minutes later, Brianna called saying that she accepted Andre$$s offer to sell the watercraft for $$500.$ A few minutes after that, Charlotte called and told that she accepted his offer to sell the watercraft for $$500.$ Andre told Brianna and Charlotte that he had already sold it$,$ and they are angry, threatening to sue. Additionally, through no fault of anyone, there was a fire at Andre$$s home that night and the personal watercraft burned. Dylan was not happy. A dispute ensues regarding what obligations Andre has, if any.

Which of the following is correct regarding the status of the negotiations between Andre and Brianna prior to the fire?