Which one of the aaa accounting commands can be used to enable logging of both the start and stop records for user terminal sessions on the router?

Which one of the aaa accounting commands can be used to enable logging of both the start and stop records for user terminal sessions on the router?

A.
aaa accounting connection start-stop tacacs+

B.
aaa accounting network start-stop tacacs+

C.
aaa accounting exec start-stop tacacs+

D.
aaa accounting system start-stop tacacs+

Explanation:
The question specifies accounting for ‘user’ terminal sessions on the router. That means
that of the options available, only exec fits. The rest do not handle user records.