The answer choice which is not one of the specialties in the property management include:
Property management refers to all the processes which are involved in the handling, the organization, the leasing and management of a piece of property, usually by a realtor.
With this in mind, we can see that concierge services includes the coordination of the guests in a lodging by making reservations and bookings and everything else which makes the customer service better and this is NOT a specialty in property management.
Therefore, the correct answer is option C
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