Which utility can a Citrix Administrator use to resolve the Domain Name System (DNS) request being looked up frequently?

Scenario: A Citrix Administrator needs to ensure that a user request is redirected to the next available data center in order to ensure the best user experience based upon location.
Below are the Global Server Load Balancing (GSLB) vserver settings:

To which setting should the administrator change the configured method?

Which Citrix ADC hardware or software platform offers a Multi-Tenant solution?

How can a Citrix Administrator configure a rewrite policy to change the version of HTTP from HTTP 1.1 to HTTP 1.0 in every request?

Which method, according to Citrix leading practices, can a Citrix Administrator use to successfully make a configuration change for a StoreFront server group?