You are trying to recover the private key assigned to an Active Directory user account. The user has two certificates (private keys) issued when examined in the Certification Authority server. Which of the following actions do you implement to recover the two certificates? Get the Thumbprint attribute of each private key and use it with Key Recovery Tool or krt.exe. Get the Thumbprint attribute of each private key and use it with certutil.exe. Get the Serial number attribute of each private key and use it with certutil.exe. Get the Serial number attribute of each private key and use it with Key Recovery Tool or krt.exe.