TPO24 聽力對話(一)的疑問 - 英檢

想請教一下
TPO24 section1,conversation第二題


對話是這樣:
Student: Oh, oh, you know what? Um, it's for a graduate class.
Would that maybe make a difference?
I mean, I am an undergrad, but I am just taking this
one class in the graduate department, so...


Clerk回答: No, no. I don't think that's it.


但是第二題問說
"what are two possible reasons that the speaker consider
for why the man cannot find the book?"

卻要選
A選項"it's for a graduate level couse"


那不是只是學生的疑惑卻被clerk反駁嗎?
懇請解惑
感恩!!!






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