History: What is the album quality bit depth?

What is the album quality bit depth?

• There is no consistent bit depth.
  Album quality audio has a standard bit depth.
• 24-bit depth. 0 to 16,777,215.
  This is larger than album quality bit depth.
• 8-bit depth. 0 to 255.
  This is much smaller than album quality bit depth.
• 16-bit depth. 0 to 65,535.
  Correct.