What$$s the output of the following code snippet?

class Dog:

def walk$($self$)$:

return $"*$walking$*"$

def speak$($self$)$:

return "Woof!"

class JackRussellTerrier$($Dog$)$:

def speak$($self$)$:

return "Arff!"

bobo $=$ JackRussellTerrier$()$

bobo.speak$()$

Question $15$ options:

CanineError: Dog malfunction

Arff!

Woof!

$*$walking$*$