You need to ensure that there is adequate bandwidth available to meet the service-level agreement requirements. Which action or actions should you perform?()
A、Upgrade all WAN lines in six months.
B、Upgrade all WAN lines prior to implementing NewApp.
C、Analyze the cause of a peak in network usage in February.
D、Analyze network usage characteristics for NewApp.
E、Based on these results, create an upgrade plan for the WAN lines.