下图为河南某地锑矿床的矿石，其构造为

A、脉状构造
B、角砾状构造
C、晶簇状构造 
D、晶洞状构状

单项选择题During the past two decades, many governments have adopted free-market economic systems, vastly increasing their own productive potential and creating numerous new opportunities for international trade and investment.

多项选择题影响决策的因素有（? ? ）[2分]