Merv: Are these your sons, Jean I haven't seen them for ages. Jean: Yes, that photo was taken a few months ago. Merv: John hasn't changed a bit. He's the very image of his father, isn't he Jean: Yes, he is. ______ That's for sure.
A．He takes up with his father. B．He really likes his father. C．He looks after his father. D．He takes after his father.