13. Edward owns a commercial building that he leases for three years to Luke to use as a restaurant. Luke installs a heater, which is bolted into the ceiling. In the second year of Luke's lease Edward sells the building to Tracy. At the end of Luke's lease, he elects not to renew his lease. A dispute arises over who owns the heater, Tracy or Luke. Which of the following statements is most accurate as pertaining to this situation?

a. The heater is a trade fixture, which Luke is free to remove at any time, even after the leasehold has ended

b. The heater is a fixture that belongs to Tracy by virtue of her purchase of the building from Edward

c. The heater is a trade fixture, which Luke may remove if he does so before the lease terminates

d. Luke may remove the heater and take it with him even if removing the heater will damage the building.