On January 15th, Mosessold an apartment building to Noelle, with apromise toinstall a newHVACheating and air conditioningsystembefore July 1st for an additional payment.The contract had a provision stating that "time is of the essence." On July 31st,MosessentanHVAC technician to begininstallation; however,Noelle demanded thatthe HVAC technicianleave the premises and refused to make the additional payment toMoses for the HVAC system. Moses immediately immediatelyfiled a lawsuit againstNoelle.Here, Moses'slate attempt to have the HVAC system installedis most likely a material breach.

Noelle's refusal to make the payment for the HVAC system is most likely:

Group of answer choices

A. a material breach.

B. complete performance.

C. appropriate, since her duty to perform was excused by Moses's failure to timely install the HVAC system.

D. substantial performance, but not complete performance.