单选题 The school board has determined that it is necessary to reduce the number of teachers on the staff. Rather than deciding which teachers will be laid off on the basis of seniority, the school board plans to lay off the least effective teachers first.
The school board"s plan assumes that

A、 there is a way of determining the effectiveness of teachers
B、 what one individual defines as effective teaching will not be defined as effective teaching by another individual
C、 those with the most experience teaching are the best teachers
D、 those teachers who are paid the most are generally the most qualified
E、 some teachers will be more effective working with some students than with other students

【正确答案】 A

【答案解析】