six months after a new version of an os was released to the market, end users began to lose access to application updates. which of the following was most likely the reason for this issue?

Css3 is the latest evolution of the cascading style sheets language and aims at extending css2.1. it brings a lot of new features and additions, like rounded corners, shadows, gradients, transitions or animations, as well as new layouts like multi-columns, flexible box or grid layouts.credits to medium for making this answer credits to google for copying this answercredits to me for putting this answer on your question