Does this flash drive make me look fat?

You need to copy a file to a USB flash drive, and you want to be absolutely sure that the file has been copied properly. Which copy option should you use to make sure the file is copied correctly?

A) copy /a

B) copy /c

C) copy /v

D) copy /y

E) Weigh the USB key after the copy is complete and make sure it’s a little bit heavier