How can you recover from this BIOS upgrade?

You’re performing a BIOS upgrade on a desktop computer, but during the upgrade the power cord was accidentally kicked out of the computer. What’s the best next step to recover from this interruption?

A) Restart the BIOS upgrade process from the beginning

B) Revert to the previous BIOS version and try the upgrade again

C) Boot to the Windows Recovery Console and try the BIOS upgrade again

D) There’s no easy way to recover from a BIOS upgrade that fails in the middle of the process

E) Coffee. Lots of coffee.