In which situation is coauthoring of presentations primarily utilized? 1. A reviewer must be able to make changes to a presentation after an author creates it.
2. Multiple authors must be able to simultaneously make changes to a presentation.
3. Multiple reviewers have to be able to view one another’s changes after they are made.
4. One author and one reviewer work on a presentation at different times.

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

Wow the answer was a on e dgenuity, ignore the other autistic answers 

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