You are the owner of the courier company SpeeDelivery. On the basis of your risk analysis you have decided to take a number of measures. You have daily backups made of the server, keep the server room locked and install an intrusion alarm system and a sprinkler system. Which of these measures is a detective measure?

A.
Backup tape

B.
Intrusion alarm

C.
Sprinkler installation

D.
Access restriction to special rooms

Explanation:
Detective countermeasures are aimed at detecting incidents.