a) To check the current version of Jquery go to Administration --> Setting --> Advanced --> Pages --> ScripManager --> ScripReferences --> Jquery
b) The .min version is installed
c) When using Sitefinity widgets which are RadControls that use JQuery to work it executes the RadControls JQuery. Without the JQuery modules like news and blogs will not work.
d) If you are not using widgets the JQuery will not execute ( which is similar to building a static website with html and css only ).
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items