What are some examples of services and facilities that a landlord can add, with the agreement of the tenant, in exchange for a rent increase.

Select one:

a.parking space, property tax for an apartment, heat, electricity

b.locker space, property tax for an apartment, block heater plug-ins

c.an A/C unit, property tax for mobile home, heat, electricity

d.parking space, property tax for an apartment, heat, extra electricity for A/C unit