NO.PZ2023040301000036
问题如下：
You have placed a sell market-on-open order—a market order that would automatically be submitted at the market's open tomorrow and would fill at the market price. Your instruction, to sell the shares at the market open, is a(n):
选项：
A. execution instruction
validity instruction
clearing instruction
解释：
Execution instructions specify how to trade;
Validity instructions specify when the order can be filled;
Clearing instructions specify how to settle the trade.
题干中写了“would fill at the market price”，为何不判定成这是个market order?
