Fact Pattern 10-2

Fact Pattern 10-2
Teatro Restoration, Inc., begins renovating an old theater for Urban Edge Productions, but after three months Teatro demands an extra $250,000. Urban Edge agrees to pay.
-Refer to Fact Pattern 10-2. If Teatro says it is asking for the extra $250,000 because ordinary business expenses have increased, the agree?ment is

A) enforceable as the consideration is past.
B) enforceable because of unforeseen difficulties.
C) unenforceable as an illusory promise.
D) unenforceable due to the preexisting duty rule.