When a tenant who has a service or support animal applies to lease an apartment in a building which does not allow pets, which of the following rules may the landlord follow?

A.Both state and federal laws require the landlord to allow any service or support animal

B. the landlord must allow the service or support animal, but may change an additional deposit

C. The landlord may disallow the animal if there are no other animals permitted in the building

D. the landlord may disallow the animal if it is not federally registered as a support or service animal