Which of the Following Is True About Personal Satisfaction Clauses

Which of the following is true about personal satisfaction clauses in contracts?

A) These clauses are usually unenforceable due to their subjective nature.
B) Where the personal satisfaction depends on personal taste and comfort,an objective standard applies.
C) Personal satisfaction is always evaluated on a subjective basis.
D) Personal satisfaction cannot be based on the satisfaction of a third party.
E) In commercial contracts,such as building construction,personal satisfaction is evaluated on an objective basis.