Answer: C. high switching costs
Step-by-step explanation:
Switching costs are the costs that the bank will incur should they decide to change janitorial services. They are higher depending on the services that will have to be replaced by the new janitorial service.
If the new janitorial service is unable to do some of the things that the old one was able to do, then switching costs will be higher.
As this is the case here, should Allied bank consider hiring some other service apart from Marie's Clean-It Corp. which would most likely not offer the security service, Allied bank would face high switching costs.