Which of the Following Statements About HVAC Is False

Which of the following statements about HVAC is false?

A) It can be the most expensive type of repair.
B) For any type of equipment,you want the landlord to at least guarantee the first six months of operation.
C) It is one of the types most likely to go wrong.
D) If the location has a central air system so everyone shares the same air conditioner and heating equipment,it is the landlord's responsibility.