Ok too easy. We going to use a baby steps approach and skim through the links I am sharing below for your review and consideration:
In regards to answer number 3, this is the best link I've found
Known issues | Adobe Acrobat DC, Reader DC
screenshot here:
The next two links include complete tables listing "Release Notes" with descriptions of updates for Acrobat Reader identifying differences betwen the Classic Track and Continuous Track:
Release Notes | Adobe Acrobat, Reader
DC release notes with complte list of installers:
DC Release Notes — Release Notes for Acrobat DC Products
See screenshot below
And this last link is or may be redundant, but I weighed its value based on how I noticed through the forums the use of incorrect terms interchangeably when referring to the Adobe products in question. It is a good reference guide to quickly familiarize ourselves with new release names
https://www.brucebnews.com/2015/04/adobe-releases-new-version-of-acrobat-12-um-acrobat-dc/