Sensei had fallen in love with Ojosan before he invited K to live with him. Why didn’t he ask Ojosan to marry him? A: Because Sensei’s love to Ojosan was not enough for him to marry her. B: Because he couldn’t totally trust Okusan and Ojosan. C: Because of his own poverty and low self-esteem. D: Because Sensei wanted to focus on study, he didn’t consider about engagement.