Which two factors contribute to the delay?

An application consisting of a single case requires sending correspondence at a designated time with minimal delay. The existing solution uses an assignment to pause the case until an SLA invokes the escalation activity that sends the correspondence. Occasionally there is a delay in sending the correspondence.

Which two factors contribute to the delay? (Choose Two)
A . The number of queued SI A objects
B . Multiple open assignments on the same case
C . Error handling for locked items
D . Correspondence rule configuration

Answer: A,B