问题如下：
Which of the following factors determines the optimal execution approach?
选项：
A.Speed of execution
Urgency of an order
Financial stability
解释：
B is correct. A list of criteria used in determining the optimal order execution approach, including urgency of an order, characteristics of the securities traded, characteristics of the execution venues used, investment strategy objectives and rationale for a trade.
为什么影响执行方法中的影响因素没有订单的大小，老师上课不是讲的主要影响因素为：大单小单 紧急程度 电子是否发达
