a为什么错？算法交易难道没有提升效率吗？

问题如下：

A factor associated with the widespread adoption of algorithmic trading is increased:

选项：

A.market efficiency. B.average trade sizes. C.trading destinations.

解释：

Global financial markets have undergone substantial change as markets have fragmented into multiple trading destinations consisting of electronic exchanges, alternative trading systems, and so-called dark pools. In such an environment, when markets are continuously reflecting real-time information and continuously changing conditions, algorithmic trading has been viewed as an important tool.