In the following example, select all variables which can be accessed inside append$\_$text when it is called.

base$\_$text $=$ 'hello'

append$\_$char $=\text{'}!\text{'}$

def append$\_$text$($text$,$ char$)$:

result $=$ text $+$ char

return result

print$($append$\_$text$($base$\_$text, 'world'$))$

Group of answer choices

text

base$\_$text

char

result

append$\_$char