In a written contract, Singer agreed to deliver to Byer 500 described chairs at $20 each F.O.B. Singer's place of business. The contract provided that "neither party will assign this contract without the written consent of the other." Singer placed the chairs on board a carrier on January 30. On February 1 Singer said in a signed writing, "I hereby assign to Wheeler all my rights under the Singer-Byer contract." Singer did not request and did not get Byer's consent to this transaction. On February 2 the chairs were destroyed while in transit in a derailment of the carrier's railroad car. ". In an action by Wheeler against Byer, Wheeler probably will recover
$10,000, the contract price.  the difference between the contract price and the market value of the chairs. nothing, because the chairs had not been delivered.  nothing, because the Singer-Byer contract forbade an assignment