tpo10听力中的一道题

rainandcmUID: 2442269

tpo10的第五个段子里的第四题
what can be inferred about the professor's view on Phosophorus getting into the rivers?
A she is unconcerned because phosophorus is a beneficial nutrient
B she is concerned about the the quanlity of phosophorus
C she thinks that the amount of research on the topic is excessive
D she is frustrate that most of her students are unware of the phenomenon
这题答案给的是C，可是觉得C不对，但是B好像也不是很对。所以请教一下大家。
谢谢。祝大家节日快乐。

rainandcmUID: 2442269

求解。自己先顶一下吧

zhouzhouahUID: 2949969

我这个版本的答案是B，而且个人觉得也是B。利用排除法，其他三个很明显不对，就第二个，文中有提及。