Respuesta :

gmany
[tex]36:39=\dfrac{36}{39}=\dfrac{36:3}{39:3}=\dfrac{12}{13}=12:13\to\boxed{A}[/tex]
36/39 or 36:39 can be simplified into 12/13 or 12:13 so your answer would be option A. Hope this helps :)