What do I do at the OS X UTILITIES screen? Restore from time machine? Reinstall OS X? Disk utility?

MY MacBook was completely unresponsive until I held down OPTION while holding POWER. I chose a netwirk now I'm here     

Would be helpful if you were to describe the reason why you attempted to access
OS X Utilities, or if you intended to access part and use Recovery instead...
•OS X: About OS X Recovery - Apple Support
This can also gain access to tools in addition to those in OS X utilities.
You could repair the computer's boot drive (hard drive, system partition)
and other things.
What was happening to lead you to try OS X Utilities? Details, please...

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