The MainActivity needs to implement the View.OnClickListener and the CompundButton.OnCheckedChangeListener. Which item shows the correct line for the class definition?

class MainActivity : AppCompatActivity$()$:

View.onClickListener :

CompoundButton. OnCheckedChangeListener $\{$

cdots

class MainActivity : AppCompatActivity$()$

implements View.OnClickListener,

implements CompoundButton.OnCheckedChangeListener $f$

cdots

class MainActivity : View.OnclickListener,

CompoundButton.OnCheckedChangeListener $\{$

cdots

class MainActivity : AppCompatActivity$(),$

View.OnclickListener,

CompoundButton.OnCheckedChangeListener $\{$

$...$