Passage Two Four in 10 teachers have faced verbal or physical aggression (袭击) from a pupil’s parent or guardian, according to the Association of Teachers and Lecturers. And of the 1 000 teachers surveyed, a quarter said a pupil had attacked them. Over a third of teachers in primary schools said they had experienced physical aggression, compared with 20% in secondary schools. The government says teachers have sufficient means at their disposal to punish destructive pupils. However, almost 60% of those questioned for the Association of Teachers and Lecturers’ survey thought pupil behavior had worsened during the past five years. And the responses of the survey questioning over 1 000 teachers from primary and secondary schools appear to suggest that bad behavior is not the preserve of secondary schools. One teacher at a primary school in England said: "A six-year-old completely trashed the staff room, put a knife through a computer screen, attacked staff and we had to call the police. Another six-year-old attacked staff and pupils with the teacher’s scissors." People. often underestimate that young children can be as violent and intimidating as the older ones. Another teacher said: "I and other members of staff were physically assaulted daily by a five-year-old (including punching). He was taken to the head to ’calm down’ then brought back to apologize. And then we were under attacks again. It became a vicious circle and I was off sick as a result." Around one third of teachers surveyed said that they had lost confidence as a result of the behavior they had faced. But most teachers (90%) reported that "destructive behavior" constituted talking in class. "Persistent low-level rudeness and destruction seems to have become a fact of life in education today and no longer raises eyebrows or seems to merit special attention," said Dr Ian Lancaster, a secondary school teacher from Cheshire. Teachers will discuss the problem at the Association of Teachers and Lecturers’ conference next week. Last year it emerged that more than 300 pupils a day were being temporarily, rather than permanently, excluded for violent conduct. A similar survey by ATL two years ago suggested half of teachers knew another who had been driven out of the profession by violent conduct. Holding firmly the idea that no member of teaching staff should be subjected to violent behavior by either students or parents, ATL strongly advocates that "Parents should be acting as good role models by supporting staff and helping them create a more positive learning environment for their children". Which group of teachers suffers from the physical aggression most

A. Teachers belong to the Association of Teachers and Cultures.
B. The 1 000 teachers who take part in the survey.
C. Teachers in primary schools.
D. Teacher in secondary schools.