问题如下：
which of the following statement about the impact of blockchain technology is incorrect?
选项：
A.blockchain technology can mitigate the cost of trust
B.Incumbent firms are hoping the technology can help them lower costs and risks, particularly for back-office or post-trade functions.
C.Start-ups are aiming to provide the public with better and lower priced services while possibly capturing part of the significant economic rents within the financial services sector.
D.blockchain technology is a centralised intermediaries can potentially reduce the ‘costs of trust’ and economic rents.
解释：
D is correct.
Blockchain technology可以降低costs of trust，但是他不是centralised intermediaries
请问选项A为什么正确？blockchain technology can mitigate the cost of trust，不能完全mitigate消除吧？书上也只是说reduce cost of trust
