A firm uses BitLocker for volume encryption. Normally, BitLocker performs its task well. However, an administrator was recently forced to decrypt and encrypt the entire volume. Why did the administrator take these actions?

The BitLocker keys were compromised

Explanation:

Given that the act of decrypting and encrypting all over is a means of troubleshooting the issue of security in computing operations. Hence, when an administrator is forced to decrypt and encrypt the entire volume, the main reason for such action can be as a result of "BitLocker keys were compromised."

Hence, the right answer, in this case, is that "The BitLocker keys were compromised."