Got this question from the Hanumant Singh book:
What are the benefits of using the Transfer Object pattern? (Select two)
a The type of the actual data source can be specified at deployment time.
b The data clients are independent of the data source vendor API.
c It increases the performance of data-accessing routines.
d It allows the clients to access the data source through EJBs.
e It allows resource locking in an efficient way.
I could pick (c) as one of the answers, but which is the other benefit and why.