问题如下：
Which of the following may have a negative effect on the capacity of a borrower to service debt?
选项：
A.Less competition in the industry.
B.Industries that rely heavily on just a few main customers.
C.High entry barriers.
解释：
B is correct.
As the negotiating power lies with the buyers, industries that rely heavily on just a few main customers have greater credit risk, thus having a negative effect on a company's ability to service debt.
C为什么不对？
