Sara is working on a computer for a client who has not backed up important data. The client's computer will not boot properly to Windows. The computer has failed three times and now has automatically launched diagnostic and repair procedures. Currently, Sara is viewing the Advanced Options screen for Windows $8\mathrm{.}1.$

What option should Sara select as the least invasive way to repair the Windows startup problem on her computer?

a$.$ System Image Recovery

b$.$ System Restore

c$.$ Startup Repair

d$.$ Command Prompt