On a UEFI-based system, which of the following invokes GRUB2 from the EFI command prompt? 

Answer options:

A. boot//EFI/grub2.efi
B. EFI/grub2.efi
C. /boot/EFI/grub2.efi
D. /grub2.efi

C

Reference: https://docs.pagure.org/docs-fedora/the-grub2-bootloader.html