Given the following code segment, the output is $\_\_.$

def func$1()$: print$("$I am the function $1.")$

$$

def func$2()$: print$("$I am the function $2.")$

def func$3()$: print$("$I am the function $3.")$

def main$()$: print$("$I am the main function."$)$

if $\_\_$name$\_\_=="\_\_$main$\_\_"$:

$$ main$()$

Group of answer choices

A$.$ I am the function $1.$

B$.$ I am the function $1.$

C$.$ I am the function $1.$

D$.$ I am the main function.