The correct answer is: D. session layer
The session layer is responsible for managing the dialogue between two applications. It provides a logical connection between the two applications and ensures that they are able to communicate with each other. The session layer also manages the flow of data between the two applications and ensures that data is not lost or corrupted.
The data link layer is responsible for error detection and correction. It ensures that data is transmitted without errors. The network layer is responsible for routing data through the network. The transport layer is responsible for providing a reliable connection between two applications.
None of the above options are responsible for dialogue control and token management.