Directions: Each question consists of legal propositions/principles and facts. These principles have to be applied to the given facts to arrive at the most reasonable conclusion. Principle: When a party to a contract has refused to perform - or disabled himself from performing - his promise in its entirety - the other party may put an end to the contract. Facts: A engaged B on April 12 to enter his service on June 1 - but on May 11 - A wrote to B that his services would not be needed. On May 22 - B joined C for employment.