If you are using a synchronous token device, what does this mean?

A.
The device synchronizes with the authentication service by using internal time or events.

B.
The device synchronizes with the user�s workstation to ensure the credentials it sends to the authentication service are correct.

C.
The device synchronizes with the token to ensure the timestamp is valid and correct.

D.
The device synchronizes by using a challenge-response method with the authentication service.