Answer:
Option C is the correct option.
Explanation:
When any user or the person change NIC from the server then, the following person is unable to make changes at that place and he exchange their information with the systems on its network because ARP cache stores all the previous Mac address entries through the remote computer. So, that's why the following option is correct according to the statement.
In technicality, humans can work healthily 14-15 hours a day, 365 days a year. I subtracted the hours of the day needed for sleep and feeding.