I called a meeting with the parents of my student, Tommy. I wanted to talk with them about his schoolwork and behaviour .Tommy was always an excellent student. How could I make his father and mother believe that their recent separation  made his grades bad.? Tommy's mother came in and sat down. Then his father arrived. But they didn't say even one word to each other. I told them about Tommy's schoolwork and behaviour. I hoped to help them see what they were doing to their son. But it looked that my words didn't work. I thought that maybe Tommy could tell them something himself. I found Tommy's paper in the back of his desk. Tommy has written some words on it many times. I gave the paper to Tommy's mother. She read it and gave it to his father. He read it and his face became soft . He reached for his wife's hand. She smiled up at him. My eyes were with tears. He helped her with her coat and they left together. I picked the paper up and looked at it again. It read: "Dear Mommy... Dear Daddy... I love you." . According to  the teacher, Tommy changed so much all because   _  .
his parents separate not long ago. his parents didn't love him any more. he didn't have good study habits . he didn't followed his parents' advice.