Why might The Pillow Book be seen as a less-than-credible source?

I believe it is B.

Explanation:

It cannot be A, because diaries can be used as primary sources if the person that is writing experienced what had happened.

It cannot be C, because primary sources can have opinions.

And it cannot be D, because the question is looking for why it is a less-than-credible source.

I hope this helped. Good luck with your Edge Test!!! :D

answer; ///i believe the correct answer is (b) the writing of the ancients who lived in india after the indus valley inhabitants died out;

the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.