问题详情

Which one of the following is not mentioned as a reason to criticize Kmeger and Dale"s research？
A．Only a small number of colleges are involved in their survey.
B．Only a small range of universities are surveyed in their research.
C．They have adopted a method that is too strict and critical.
D．They have drawn conclusions that are not very convincing.请帮忙给出正确答案和分析，谢谢！