Read the following article and select the best answer. Article: Little Mary is a good girl. She's in Grade 2 now. Her home is not far from school, but she is often late for class because she likes watching TV, listening to music in the evening and she goes to bed very late. So she can't get up on time in the morning. This term Mr White, Mary's uncle, works in her school. He teaches Grade 2 history. He often tells Mary to follow the school rules and come to school on time. Today Mary get up late again. When she comes to school, it is 8:15 . Her uncle is waiting for her at the school gate. "You are ten minutes late for the first class." Mr White says angrily . "Why are you often late for class?" "Every time when I get to the street corner , I always see a sign . It says 'SCHOOL-GO SLOW! ' " says Mary. Question: The sign on the street corner is for _ . - drivers - Mary - students - teachers
The answer to this question is:
drivers