What type of attack is taking place when a higher-level subject writes data to a storage area and a lower-level subject reads it?

A.
TOC/TOU

B.
Covert storage attack

C.
Covert timing attack

D.
Buffer overflow

Explanation:
B: A covert channel is being used when something is using a resource for communication purposes, and that is not the reason this resource was created. A process can write to some type of shared media or storage place that another process will be able to access. The first process writes to this media and the second process reads it. This action goes against the security policy of the system.