What is the difference between the enable password and the enable secret password when service password encryption is enabled on an IOS device?

What is the difference between the enable password and the enable secret password when service password encryption is enabled on an IOS device?

A. The enable secret password is protected via stronger cryptography mechanisms. B. The enable password cannot be decrypted. C. The enable password is encrypted with a stronger encryption method. D. There is no difference and both passwords are encrypted identically.