Answer:
a. with shortages and waiting lists, they have no incentive to maintain and improve their property.
Step-by-step explanation:
Under rent control, landlords cease to be responsive to tenants' concerns about the quality of the housing because with shortages and waiting lists, they have no incentive to maintain and improve their property.
Due to the increasing demands for accommodation, landlords cease to be responsive to tenants concerns about quality of housing because there is no incentive to maintain their house as there will be individuals willing to move into the property regardless of its current situation.