For Which of the Following Contracts,is a Party's Subjective Dissatisfaction

Multiple Choice

For which of the following contracts,is a party's subjective dissatisfaction sufficient to excuse his performance under a "personal satisfaction" clause in a contract?

A) A contract to construct an intercontinental ballistic missile
B) A contract to paint someone's portrait
C) A contract to build a steam boiler
D) A contract to rebuild an automobile engine