【单选题】

What can we know from the sentence "And Wall Street banks, whose lucrative stranglehold on IPOs is threatened, are also keen to prove that companies cannot list without the help of banks in finding buyers for them" in Paragraph 4
A．(A) IPOs are controlled by Wall Street banks, SEC, and big investors.

B．(B) Compared with investors, Wall Street banks are not big stakeholders in IPOs.
C．(C) Wall Street banks usually make a lot of profit out of their service in companies' IPOs.
D．(D) Wall Street banks refuse to find buyers for those companies who threaten their own business development.