Today you turned on your computer after being on vacation for a week. You see spinning white dots on a black screen. You decide that an update might be installing, so you allow the computer to work for approximately $20$ minutes. After $20$ minutes, you turn off your computer and then restart it$,$ and it fails two more times.

Choose the tool you would use to help repair your computer system.

a$.$ Use Startup Repair.

b$.$ Use Safe Mode to boot.

c$.$ Run sfc $/$scannow for Windows RE command prompt.

d$.$ Use BIOS to see if the hard drive is available.