Which metric is the most relevant to this problem?

An online store web application is deployed to a WebLogic server cluster. User of the
application frequently complain that the information in their shopping cart vanishes before
they are able to complete an order. You use the Administration Console to monitor the web
application. Which metric is the most relevant to this problem?

A.
Average execution time

B.
Session timeout

C.
Current session count

D.
High session count

E.
Cookie domain