Consider the following regular expression:

$($alb$)*$abt

What is the language accepted by this regular expression?

All strings that start with $"ab{b}^2$ and contain only the characters $"a"$ and $"b",$

Ift strings that starts with ab and ends with abb

All strings that contain at least one occurrence of "abb" and contain only the

characters $"a"$ and $"b".$

All strings that do not contain "abb" and contain only the characters $"a"$ and $"$b$"$