Orson Is Trying to Open an Encrypted File on His

Multiple Choice

Orson is trying to open an encrypted file on his Windows 10 system. The file was encrypted using EFS, and he opened this as recently as last week.
Which of the following is most likely the reason that Orson is unable to open the file?

A) Orson moved the file from its original folder to a different folder.
B) Orson reset the password of his Windows user account.
C) Orson failed to back up the EFS certificate on a smart card.
D) Orson created a duplicate copy of the file on another partition.