Fact Pattern 18-B1 (Questions B9-B10 Apply)

Multiple Choice

Fact Pattern 18-B1 (Questions B9-B10 apply)
Moses sells an apartment building to Noelle with a promise to install a new heating and air conditioning system before September 1.The following February 1,Moses sends Ollie,an HVAC technician,to begin the installation.Noelle orders Ollie to leave and refuses to make further payments to Moses,who files a suit against Noelle.
-Refer to Fact Pattern 18-B1.Noelle's refusal to make further payments is most likely

A) a material breach.
B) complete performance.
C) excused by Moses's failure to timely install the ventilation system.
D) substantial,but not complete,performance.