一道阅读理解题which of the following statements is true

一道阅读理解题which of the following statements is true
A professionals' lack of BMI prevents conveying messages.这个选项是错的,原文是这样的：Perrin said her team could not tell the reason why,even today,perhaps only a third of parents,at best,are getting the message about obesity.some professionals might be unfamiliar with BMI(mass index) charting and the related definition of overweight and obesity.麻烦解释一下错误原因,