The web browsers that function to 'wake tech recommended' for approaching blackboard irrespective of the operating system include: 
A). Firefox.
C). Chrome 
Web Browsers
-  The 'Blackboard collaborate' is only accessible to a certain specified union of operating systems along with the cooperative web browsers.
- The Web Browsers that are certified in terms of being compatible with the blackboard feature include Safari, Chrome, Firefox, etc.
- These browsers have the capability to support the access of blackboard courses on both OS, as well as, windows platforms. 
Thus, options A and C are the correct answers.
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