What does BASH (as in the shell) stand for?

What does BASH (as in the shell) stand for?

• Bright And Simple sHell
• Bourne Again SHell
• Basic ASCII SHell
• Bad Assed SHell 

EXPLANATION

Bash is a Unix shell and command language written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell. First released in 1989, it has been distributed widely as the default login shell for most Linux distributions and Apple's macOS. A version is also available for Windows 10. It is also the default user shell in Solaris 11.