Comprehensive and Detailed in Depth Explanation:

When a dynamic credential is deleted externally, Vault may fail to revoke the lease due to the missing backend secret. The HashiCorp Vault documentation states: "The -force flag is meant for recovery situations where the secret in the target platform was manually removed." The command vault lease revoke -force -prefix allows Vault to forcibly revoke all leases under the specified prefix, bypassing the error.

The docs elaborate: "Using -force with -prefix will revoke all leases that match the given prefix, even if the underlying secrets cannot be found or revoked on the target system. This is useful for cleaning up Vault’s lease table when external changes disrupt normal revocation." Here, would be the path like database/creds/role/.B (vault lease -renew)renews leases, not removes them.C (-enforce)is not a valid flag.D (vault revoke -apply)is incorrect syntax. Thus, A is correct.