On the 1st of June, Roscoe makes an offer by mail to Yvonne to sell her his antique ivory carving of a Nubian slave girl. He offers to sell for $50,000 and gives her 21 days to accept. Yvonne loves this particular antique, having begged Roscoe for an opportunity to buy it on a number of previous occasions. However, she is having some difficulty raising the money, so she does not reply immediately. In the meantime, Nerdie approaches Roscoe and offers him $60,000 for the same antique. He has the amount in cash and so Roscoe decides to accept his offer, accepts the cash and gives Nerdie the antique. Yvonne is not aware of this and on the 19th of June finally secures finance and so posts her acceptance to Roscoe. Which of the following is most correct? 

A

Yvonne is too late 

B

Yvonne can get specific performance ordering Roscoe to retrieve the antique 

C

Yvonne can get specific performance ordering Nerdie to hand back the antique 

D

Yvonne can sue Roscoe for breach of contract relying on the postal rule 

E