单项选择题

A.It mandates that HTTP sessions must be stored in an Oracle RAC database for the highest  throughput and availability.
B.It pins a connection to the thread associated with a web session such that subsequent  connection reservations are significantly faster.
C.It stores a reference to the connection associated with an HTTP session in the session object.
D.It allows developers to modify how their web application reserves and releases database  connections to allow enhanced performance.
E.It provides improved performance by associating a database connection with an HTTP session.