问题详情

In paragraph 6 the author implies that
A．the teacher should guide all discussions by revealing her own attitude.
B．in some aspects of social studies a greater variety of methods can be used in the upper grades than in the lower grades.
C．people usually act on the basis of reasoning rather than on emotion.
D．children"s attitudes often come from those of other children.请帮忙给出正确答案和分析，谢谢！