What is causing the slow loading issue?

A client has been tolling out Forms Portal pages as their implementation proceeds. The client has been granting access to larger numbers of users through this time. Managers have noticed that some of their pages have been loading more slowly as the rollout proceeds. Other pages do NOT seem to be impacted.

What is causing the slow loading issue?
A . A high number of forms loaded onto Forms Portal
B . A high number of LDAP users
C . A high number of active user sessions
D . A high number of users in a Closed User Group

Answer: A