Hi!
Correct me if I'm wrong, but we are comparing oranges and apples here :-) The transaction subsystem (JTS) is based on the transaction architecture (JTA), and containers, applications and the like implement/use these mechanisms in order to have transaction management, which manages transactions for
EJB's, JDO implementations and stuff like that. Thus, the only alternative that may be correct - because it's the only one that may make sense - is a).
My 2 cents,
Alessandro Martins
No certs, only battle scars... :-)