Which method requires the least effort for all types of endpoints (campus and data center) across the enterprise?

Various methods are available for load-balancing across WSA deployment.

Which method requires the least effort for all types of endpoints (campus and data center) across the enterprise?
A . Use WPAD that uses the IP address of the WSAs.
B . Configure the WSA as an SXP speaker to push static SGT-To-IP bonding to a load-balancer for traffic prioritization.
C . Push out proxy setting to endpoints through Windows GPO settings.
D . Configure an SRV DNS record to point to the WSA for all web services
E . Use transparent Layer 4 redirection with multiple WSAs behind a load-balancer.
F . Host a PAC file on the WSA or an intranet web server and point all endpoints to it for auto-configuration

Answer: E